Using base and height. Perimeter of a triangle formula The formula for the perimeter of a triangle T is T = side a + side b + side c, as seen in the figure below: However, given different sets of other values about a triangle, it is possible to calculate the perimeter in other ways. Goal: Theory: Part 1. Semiperimeter Of Triangle calculator uses Semiperimeter Of Triangle =Perimeter Of Triangle/2 to calculate the Semiperimeter Of Triangle , The Semiperimeter Of the Triangle is half of the measurement of the perimeter of the triangle. The word 'perimeter' comes from Greek, 'peri' means 'around' and 'meter' means 'measure'. The formula is based on all three sides of the triangle. bhagodivishwanath bhagodivishwanath 1 hour ago Math Primary School Find the semi perimeter of a triangle whose sides are 25cm, 5cm,and 24cm. Math Geometry Physics Force Fluid Mechanics Finance Loan Calculator. window.jQuery || document.write('