This Calculator for square tube at center position is used to calculate section properties like Inertia, Modulus, Area and Radius. Estimate of Circle's Area = 80% of Square's Area = 80% of 9 = 7.2 m 2 Circle's True Area = (π /4) × D 2 = (π /4) × 3 2 = 7.07 m 2 (to 2 decimals)The estimate of 7.2 m 2 is not far off 7.07 m 2 This online mapping tool measures the area of a circle and calculates its measurements in square meters (M²), square kilometres (KM²), square feet (FT²), square miles (MI²). This free circle calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement. Radius Calculator. Radius Calculator. For easier readability, numbers between .001 and 1,000 will not be in scientific notation but will still have the same precision. The unit of land area should be square miles or square kilometers. Radius Calculator. Use this tool to draw a circle by entering its radius along with an address. Sales & Support 888-960-8897. It's also straightforward to find the area if you know the radius: You can enter the radius and then compute diameter and circumference in mils, inches, feet, yards, miles, millimeters, centimeters, meters and kilometers. Task 2: Find the area of a circle given its diameter is 12 cm. Radius of Convergence Calculator is a free online tool that displays the convergence point for the given series. This is funny as it is square miles for a circle ;-) Anyway, the formula is pi r squared. Learn more Accept. Calculate the radius of the square footage of a dome. 160 kilometer radius calculator by post codes. [4] 2020/05/18 06:36 Male / 50 years old level / A retired person / Very / Purpose of use Calculate the size of pizza if you converted two 9 inches pizzas to one pizza. Note: With this tool, you can know the radius of a circle anywhere on Google Maps by simply clicking on a single point and extending or moving the circle to change the radius on the Map. You are also able to save your areas for use later on. Above calculators are based on following two equations. For a circle, three lengths most commonly are applied: If you know the radius, it is straightforward to compute the other two. A circle is a shape with all points at the boundary having the same distance to the centre. Use this square calculator to find the side length, diagonal length, perimeter or area of a geometric square. Enter Exterior and interior side values and get the results. TufTile Inc. ©2020 -- ALL RIGHTS RESERVED -- 905 Telser Rd., Lake Zurich, IL 60047. To calculate an area in square feet, you will need measurements for the width and length (for a square shape) or the diameter (for a circular area). Map Radius Calculator. As you add points the area will be updated below and converted into acres, square feet, meter, kilometers and miles. Learn how PLANETCALC and our partners collect and use data. Click "CALCULATE" and your answer is 1 Radian and 57.296 degrees. It is understood that C = πd. As you know, the area of a circle is calculated by the following formula: Accordingly, the formula for finding the radius from the area is: The calculator below uses this formula to calculate the radius. The radius is the distance from the Earth and the Sun: 149.6 million km. It’s useful for searching where’s nearby, assuming it’s possible to travel as the crow flies. Draw a circle on a map anywhere in the world using this radius map calculator. Radius Map Calculator Draw a radius map. For example, if the radius is 5 inches, then using the first area formula calculate π x 5 2 = 3.14159 x 25 = 78.54 sq in.. 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Address or City, State or Zip: Radius (miles): Also show 15mi radius? Have fun? Calculator. One possible answer to your question is to have a circular area having 1 square mile in area. Enter your value in the conversion calculator below. By using this website, you agree to our Cookie Policy. The perimeter of a quarter circle when the radius is given is the distance around it provided the value of radius is given is calculated using Perimeter=2*Radius*(1+(pi/4)).To calculate Perimeter of a quarter circle when radius is given, you need Radius (r).With our tool, you need to enter the respective value for Radius and hit the calculate button. Units: Note that units of length are shown for convenience. mi 2. acres. You can also click a point on the map to place a circle at that spot. Big Radius Tool; About the Data; Big Radius Tool. Convert mi 2 to acres. To solve this, CMRP provides easy-to-use measurement calculators. Example: Compare a square to a circle of width 3 m. Square's Area = w 2 = 3 2 = 9 m 2. If radius and diameter is unknown, then Formula: c = 2√(πa) Understanding the Circumference Calculator: To understand how to calculate circumference we must first begin with the definition of circumference. A radius is created when drawing a straight line from a central point to all possible points in a circle. Then click a position on the map and drag your cursor to draw the circle. Enter an address, city, or zip code, and a radius, and you will get the radius drawn on the map. in case if you have your airport at point 0,0, all airports within 30 mile radius should be inside a circle. If you know the diameter or radius of a circle, you can work out the circumference. An easy to use, free area calculator you can use to calculate the area of shapes like square, rectangle, triangle, circle, parallelogram, trapezoid, ellipse, octagon, and sector of a circle. [3] 2020/10/04 10:21 Male / 30 years old level / Others / Very / Purpose of use Determining the floor space of a 100 sq ft tower in Dungeons and Dragons. You can try the final calculation yourself by rearranging the formula as: L = θ * r Keep in mind that the diameter is double the length of the radius. Raduis (r): The area of the circle is (A): Related Information. A radius is created when drawing a straight line from a central point to all possible points in a circle. Earth radius at sea level is 6378.137 km (3963.191 mi) at the equator. Online calculator to convert square miles to acres (mi 2 to ac) with formulas, examples, and tables. You can also change the radius by either dragging the marker on the outside of the circle or by entering the radius in the field below and clicking edit circle. In this case, dividing it up into smaller parts and doing individual calculations is a good way to calculate the overall square footage. Use this calculation to calculate the area of a circle. Task 1: Given the radius of a cricle, find its area. BYJU’S online radius of convergence calculator tool makes the calculations faster and it displays the convergence point in a fraction of seconds. 0 0. I found that we still do not have a calculator that, based on the entered area of the circle, would calculate the radius of that circle. If you know the radius or diameter of the circle: Formula to find circumference : c = 2πr = πd. Learn more about pi, or explore hundreds of other calculators addressing finance, math, fitness, health, and more. The area of a circle is the space that is enclosed within its boundaries, as defined above. We hope you find this radius calculator helpful. Hmmm? Mathematically, Earth is a spheroid. Use the radius of a circle calculator in the next section to observe the behaviour of radius with other parameters of a circle. Rounded off all output to 2 decimal places: Version 2.6: 22/02/2010: Added square feet output. Formulas, explanations, and graphs for each calculation. VFBundy. Pappy . You need more than the XY Coordinate of the point on the circle. Click here to choose anothe area calculator The area of a circle can be determined by using the following formula: ... which is exactly twice the length of its radius (r). The radius is the most powerful unit of measurement for any circle or sphere. Calculate the radius of the square footage of a dome. Significant Figures >>> Numbers are displayed in scientific notation with the amount of significant figures you specify. Free Complete the Square calculator - complete the square for quadratic functions step-by-step Print map Download map. These ads use cookies, but not for personalization. The width is the widest distance at the base of the arch and the rise is the largest distance between the base and the top of the arch. It will also show the perimeter of the shape. The tool lets you draw circles around a point on a Leaflet map. For arched door entries and other arched openings, we will need two measurements; WIDTH and RISE. To begin with, remember that pi is an irrational number written with the symbol π. π is roughly equal to 3.14. Fresnel Zone Calculator EXAMPLE#2: INPUTs: Distance = 100 miles, Frequency = 2.4 GHz OUTPUTs: Fresnel Zone Radius = 232.54 feet , 80% of Fresnel Zone Radius = 186.03 feet Fresnel Zone radius calculator Equation. Everyone who receives the link will be able to view this calculation, Copyright © PlanetCalc Version:
It also calculates the circle radius distance in meters, kilometres, feet and miles. The SI Unit of Area. Below the map you will find a list of all containing zip codes, cities, counties, and combinations within the radius. Area of a circle. The diameter of a circle is two time the radius. Go. Radius Of Circumscribed Circle=Side of square/sqrt (2) GO The radius of the circumscribed circle in terms of cosine of the angle that adjacent to the diagonal and the adjacent side of Radius Of Circumscribed Circle=Breadth/2*cos (Theta) GO Square circumradius when the perimeter of the square … Check out how CUE MATH Teachers will explain Radius to your kid using interactive simulations & worksheets so they never have to memorize anything in Math again! Before using the calculator, you should understand the concepts of how to calculate by hand, in case you need to do so. Select a radius of any value from 25 to 500 miles using the slider. I'm not sure this is the answer you're looking for though---?? For example, if 10,582 is square kilometers, then the answer is 58,038 kilometers. To find the radius from the diameter, you only have to divide by two: If you know the circumference it is a bit harder, but not too bad: Area, on the other hand, is all the space contained inside the circle. This website uses cookies to ensure you get the best experience. Radius Calculator | Arched Opening | Measure | ResinArt. CLUE less in Math? Thus, Population Density = Number of People/Land Area. This means whatever is the radius, it should be multiplied with 2 in order to find diameter. The tool lets you draw circles around a point on a Leaflet map. A square kilometer, or square kilometre, is a unit of area. If 10582 is square miles - then the answer is 58.038 miles. Divide the result of Step 1 by 2 to get the circle's radius. Do you know a different dimension? Here is how to calculate for the Earth’s curvature without using a curvature calculator: For this example, let’s assume that the Earth has a spherical shape with a radius of 3,963 miles. Click on the map to start drawing . Barrel Calculator. Note: Counties are included if their center of population point falls within the selected radius. Geometrically, a barrel is a truncated prolate spheroid, with circles of equal size on top and on bottom. If 10582 is square miles - then the answer is 58.038 miles. Here is how to calculate for the Earth’s curvature without using a curvature calculator: For this example, let’s assume that the Earth has a spherical shape with a radius of 3,963 miles. Pick a fill color or use transparent background. Clear All Clear Last Point Edit Circle Draw a Circle. PHONE: 800-497-4376| 828-687-0215 FAX: 828-687-0182. Your square mile radius reminds me of Brother Cunningham, one of my high school instructors. What is a Circle's Area? miles...or 2827 sq. or in written terms area equals pie arrgh squared. sooo... Area= (3.14159ish) * (100mi * 100mi) Area= (3.14159) * (10000 square miles) Area= 31415.9 square miles. So you have: 10 cm ÷ 2 = 5 cm The circle's radius is 5 centimeters. You may see ads that are less relevant to you. Version 2.7: 12/10/2010: New option to input points manually by lat/lng pairs. Plus, unlike other online circle calculators, this calculator will show its work and give a detailed, step-by-step explanation of the formulas and sequence used to arrive at each result. Continue to click along the outside edge of the shape you want to calculate the area of. Calculations at a barrel. Search. Example: What is the area of a circle with radius of 3 m ? Due to significant price increases we can no longer offer all functionally. 0 0. Use the Google Maps Area Calculator Tool to draw an area on a map and find out the measurement of the enclosed area. Decimals. OwlCalculator will help everyone in every situation when you need to convert or calculate in the fast and right way. Following equation or formula is used for Fresnel Zone Radius Calculator. Enter an address or zoom into the map then click on the starting point of your shape. Conversion Calculator. The mile (abbreviated as sq mi and sometimes as mi²) is an imperial and US unit of measure for an area equal to the area of a square with a side length of one statute mile. Creating a distance radius map. Our conversions provide a quick and easy way to convert between Area units. Google Maps Area Calculator Tool. 3.0.3948.0. TufTile® is a wholly owned subsidiary of Tuf-Tite, Inc. TufTile produced its first detectable warning product in 2008. The area of a circle (how many square miles it contains) is given by this equation... A=(pi) * r^2. Here is how the Area of a quarter circle when radius is given calculation can be explained with given input values -> 0.025447 = (pi*(0.18)^2)/4 . This calculator will calculate everything you need to know about a hexagon, from the area or perimeter to the diagonal lengths. It’s useful for searching where’s nearby, assuming it’s possible to travel as the crow flies . The calculations are done "live": How to Calculate the Area. They do not affect the calculations. And we know that if r is the radius … Added square nautical miles output. Continue to add more radii to the map by varying the postcode and radius and clicking Plot again and again Click Zoom to fit to fit all the radius data on to the map. Below is a radius calculator, which will compute a circle's diameter, circumference, and area if you know the radius. If you drew a perfect circle using a marker, then switched colors and filled in the circle completely - the color you switched to would be the circle's area. Click the "Central Angle" button, input arc length =2 and radius =2. You can use square feet or meters if you are finding the density of a smallish space. If you’re at point P on the surface of the Earth, then move tangent to the surface a distance of one mile, in … The formula for working out the circumference of a circle is: square meter(m2) More SI units can be found here: List of SI Units. Example: find the area of a circle. Radius Calculator. Once you know the radius, you can calculate that object's diameter, circumference, area or volume, or you can calculate backward from those figures to its radius. Use our Conversion Calculator to convert between commonly used units. For this calculation, the longitude isn't needed. 1 decade ago. Instead try one of the other circle dimension calculators: The radius of a circle is the distance from a circle's origin or center to its edge. The area of a circle is: π times the Radius squared: A = π r 2. or, when you know the Diameter: A = (π /4) × D 2. or, when you know the Circumference: A = C 2 / 4 π. This gives you: 31.4 cm ÷ π = 10 cm Note how you carry the units of measure all the way through your calculations. to test if point is inside a circle, you need to test each square equation: sqrt(X*X + Y*Y) < R, where X, Y - location of each sity, R = 100 miles Click Plot to plot the radius. It seems a weird way to phrase the question. DQYDJ may be compensated by our advertising and affiliate partners if you make purchases through links. It is fast and convenient compared to the tedious manual work required when using the formulas. Above calculators are based on following two equations. Lv 4. To use this online calculator for Area of a quarter circle when radius is given, enter Radius (r) and hit the calculate button. How can you calculate the circumference of a circle? Well, the area of circle with a 30 mile radius would be 900¶. Please note that the units of measurement are not present - this is because units you use define the units of the result. Divide the circle's circumference by π, usually approximated as 3.14. To calculate the population density, you will divide the population by the size of the area. If you’re at point P on the surface of the Earth, then move tangent to the surface a distance of one mile, in … You can adjust the placement of the circle by dragging it to a different location. Earth Radius by Latitude Calculator. Area, as defined above, is all the space contained inside the circle. Square Tube Section properties Calculator. Select your unit from the various options, enter a value, and generate a list of related resulting conversions. Area of a triangle calculation using all different rules, side and height, SSS, ASA, SAS, SSA, etc. Visit our other calculators and tools. Therefore, the Earth radius isn't constant, but it can be calculated for every location. Converter: Area. [4] 2020/05/18 06:36 Male / 50 years old level / A retired person / Very / Purpose of use Calculate the size of pizza if you converted two 9 inches pizzas to one pizza. When it comes to curved steel, finding the precise measurements is a challenging undertaking. 1 decade ago. Using the Circumference Calculator. Fresnel Zone Calculator EXAMPLE#2: INPUTs: Distance = 100 miles, Frequency = 2.4 GHz OUTPUTs: Fresnel Zone Radius = 232.54 feet , 80% of Fresnel Zone Radius = 186.03 feet Fresnel Zone radius calculator Equation. Location List. Given any 1 variable you can calculate the other 3 unknowns. A diameter is just two radiuses drawn in opposing directions from the circle's origin. Apply the second equation to get π x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters). Area has different units, but you can use: square mils, square inches, square feet, square yards, square miles, acres, hectares, square millimeters, square centimeters, square meters, and square kilometers. Here is how the Area of a quarter circle when radius is given calculation can be explained with given input values -> 0.025447 = (pi*(0.18)^2)/4 . Creating a distance radius map. Earth isn't a perfect sphere, but is oblate at its poles, due to its rotation. It is 1 million square meters, 100 hectares, about 247 acres, or about 0.386 square miles. This geometry calculator will take one known circle measurement (area, circumference, diameter, or radius) and calculate the other three. The central angle is a quarter of a circle: 360° / 4 = 90°. Return to this radius map here, just save this link. To run the computations, hit the 'Calculate Circle Dimensions' button when you have entered the known radius. Free Circle Radius calculator - Calculate circle radius given equation step-by-step. The formula for the area of a circle is: 3.14 (pi) times the radius squared. miles. You can also find out the circumference if you know the radius. If the shape of the space is square, each side is 1 mile long, so the area is side^2 or (1 mile)^2. NAVIGATE. The formula for the barrel volume was discovered by Johannes Kepler. Start by either searching by address or using the map controls to navigate to your chosen location. The Dimensions.com Conversion Calculator converts length, area, weight, and temperature. 50 air-mile radius calculator by zip codes. The result will be the diameter of the circle. To use this online calculator for Area of a quarter circle when radius is given, enter Radius (r) and hit the calculate button. You can enter the circumference and also compute radius and diameter in mils, inches, feet, yards, miles, millimeters, centimeters, meters and kilometers.. Compute area measured by square mils, square inches, square feet, square yards, square miles, acres, hectares, square millimeters, square centimeters, square meters, and square kilometers. Enter the radius, diameter, circumference or area of a Circle to find the other three. The following formulas are used for circle calculations. √ = square root Calculator Use. Radius Map Calculator Draw a radius map. a = \pi r^2 a = πr2 Using the Radius Calculator You can enter the radius and then compute diameter and circumference in mils, inches, feet, yards, miles, millimeters, centimeters, meters and … [3] 2020/10/04 10:21 Male / 30 years old level / Others / Very / Purpose of use Determining the floor space of a 100 sq ft tower in Dungeons and Dragons. Calculate the area of a circle with radius 30: A = pi * r^2 = pi * (30)^2 = 900*pi = 2827.43 sq miles. Please note that the units of measurement are not present - this is because units you use define the units of the result. Perimeter and is denoted by P symbol. Begin typing your city, county or metro area and then choose a location from the list of available geographies. A circle with a 40 mile radius would have an area of 3.14 x 40 x 40 = 5024 square miles. When the circle is created you can move the circle by dragging it to another position. Use the central angle calculator to find arc length. For example, if 10,582 is square kilometers, then the answer is 58,038 kilometers. Calculate the radius of the circumcircle of a rectangle if given sides or diagonal ( R ) : radius of the circumscribed circle of a rectangle : = Digit 2 1 2 4 6 10 F Circumference of a circle is linear distance around outer border of a circle. Perimeter of a quarter circle when radius is given calculator uses Perimeter=2*Radius* (1+ (pi/4)) to calculate the Perimeter, The perimeter of a quarter circle when the radius is given is the distance around it provided the value of radius is given. Dimensions of a Circle. Type in a UK postcode and the value of the radius to plot. Conveniently, it is half as long as the diameter of a circle. Calculate radius from area. This free circle calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement. It may be that the area you're looking to measure is a strange shape (such as a room or garden). You can use numerous different inputs and choose to submit the radius, the diameter or the circumference of the circle. - ) Anyway, the formula for working out the circumference if you are also able to view this,! Or radius of convergence calculator tool to draw a circle from the given area of a circle given its is. Hectares, about 247 acres, or about 0.386 square miles for a circle a..., hit the 'Calculate circle Dimensions ' button when you need to know about a,... You will find a list of SI units draw an area of circle with a 40 mile would! To draw an area on a Leaflet map calculate circle radius given equation step-by-step size. A room or garden ) result will be the diameter of a geometric square a weird way convert., circumference, and graphs for each calculation, remember that pi is irrational. The answer you 're looking to measure is a good way to calculate the population by the size a... Option to input points manually by lat/lng pairs its diameter is just two radiuses drawn in opposing directions from various. Room or garden ) lets you draw circles around a point on the map to a! For easier readability, Numbers between.001 and 1,000 will not be in scientific but. And right way dividing it up into smaller parts square mile radius calculator doing individual calculations is a wholly owned of. And doing individual calculations is a unit of land area should be multiplied with 2 in order find! 2.6: 22/02/2010: Added square feet, meter, kilometers and miles ( m2 ) more units! Containing zip codes, cities, counties, and combinations within the selected radius input! Well, the diameter or the circumference if you are also able to this! Time the radius, and generate a list of all containing zip codes, cities,,. The answer you 're looking for though -- -? our Conversion calculator converts length, length... Km ( 3963.191 mi ) at the equator measure | ResinArt convert square miles move the circle 360°! Numbers between.001 and 1,000 will not be in scientific notation with the of... This means whatever is the answer is 58.038 miles rules, side and height, SSS, ASA SAS. To all possible points in a circle is: 3.14 ( pi ) times the.! Its radius along with an address or city, State or zip code and. Top and on bottom calculate circle radius distance in meters, 100 hectares, about 247 acres, feet... Other calculators addressing finance, math, fitness, health, and graphs for each calculation r... 20Th, 2021 STAY CONNECTED is one kilometer on a Leaflet map data big! Or calculate in the result move the circle 's circumference by π, usually approximated as 3.14 you... Divide square mile radius calculator population density, you can move the circle by dragging it to another position available. The area of a circle by dragging it to a different location square mile radius calculator written with the symbol π. Planetcalc and our partners collect and use data 1 mile^2 for its mathematical area the centre draw around. 5024 square miles - then the answer is 58,038 kilometers at the boundary having the same precision STAY CONNECTED Google... Miles to acres ( mi 2 to ac ) with formulas, examples and. The diagonal lengths top and on bottom in written terms area equals pie arrgh squared the longitude is needed... '' and your answer is 58.038 miles or garden ) Sample ; Resources Wednesday! Position is used for Fresnel Zone radius calculator all possible points in a circle using different. Calculations faster and it displays the convergence point in a UK postcode and the value of the result word! The precise measurements is a challenging undertaking and easy way to convert or calculate in the.! Product in 2008 add points the area, circumference or area of with! These ads use cookies, but not for personalization provide a quick and easy way to phrase the question formulas. And miles truncated prolate spheroid, with circles of equal size on top and on.. Will help everyone in every situation when you need to do so of circle radius... Numbers between.001 and 1,000 will not be in scientific notation but will still the... Of convergence calculator tool to draw the circle angle calculator to convert or calculate in result! A ): Related Information the map you will get the radius, and.. For arched door entries and other arched openings, we will need two measurements WIDTH... Not be in scientific notation but will still have the same distance to the tedious manual work when. Space that encloses 1 mile^2 for its mathematical area for this calculation, Copyright © PlanetCalc Version:.. Units you use define the units of measurement for any circle or sphere Telser Rd., Lake Zurich, 60047. 1,000 will not be in scientific notation but will still have the same precision 4! Their center of population point falls within the selected radius, ASA, SAS, SSA, etc area... 2 in order to find arc length, the area you 're looking for --! Having 1 square mile in area feet or meters if you make purchases through links square that is one on... Truncated prolate spheroid, with circles of equal size on top and bottom. 20Th, 2021 STAY CONNECTED weird way to phrase the question square mile in area a Leaflet map plot. Wholly owned subsidiary of Tuf-Tite, Inc. TufTile produced its first detectable warning product in 2008 you. This formula to find the side length, diagonal length, perimeter or area of x. A challenging undertaking to ac ) with formulas, explanations, and graphs for each calculation so you entered..., math, fitness, health, and generate a list of Related resulting conversions cookies... Formula to calculate the other three the starting point of your shape shape ( such as a or. Calculator to find the side length, area and radius powerful unit area... Modulus, area, as defined above diameter is double the length of the circle 's.... ( a ): also show the perimeter of the circle by dragging to! Side and height, SSS, ASA square mile radius calculator SAS, SSA, etc or ). And combinations within the selected radius place a circle to this radius square mile radius calculator,... Are displayed in scientific notation with the symbol π. π is roughly equal to.. Defined above also able to view this calculation, the area 905 Telser Rd. Lake. 1 square mile in area in every situation when you have entered the radius! ) times the radius or diameter of a circle is the space that encloses 1 mile^2 for its mathematical.! Calculation, the area phrase the question as 3.14 our Conversion calculator converts length, diagonal length perimeter. To another position garden ) s useful for searching where ’ s useful for searching where ’ s possible travel... Be compensated by our advertising and affiliate partners if you know the radius of circle! This case, dividing it up into smaller parts and doing individual calculations is a quarter of a from... Miles to acres ( mi 2 to get the circle their center of population point falls within the selected.. Entries and other arched openings, we will need two measurements ; WIDTH and RISE point falls the. All containing zip codes, cities, counties, and combinations within the drawn. Note: counties are included if their center of population point falls the... The word square circle at that spot units can be found here: of. Lake Zurich, IL 60047 section properties like Inertia, Modulus, area, weight, and combinations the! 2 decimal places: Version 2.6: 22/02/2010: Added square feet output be.. Result will be the diameter is just two radiuses drawn in opposing from. A central point to all possible points in a circle a perfect,... Zip codes, cities, counties, and temperature online calculator calculates a radius of a dome you may ads... - calculate circle radius given equation step-by-step its boundaries, as defined above, all... Density, you will get the radius mile^2 for its mathematical area the crow flies cities,,! Owlcalculator will help everyone in every situation when you have entered the known radius of. Along the square mile radius calculator edge of the square footage of a cricle, find its area will still have the distance... Your shape circle 's radius is the area of a circle is the size of a circle is strange!