Page 3 - Mensuration of 2D Figures

Method 2

When three sides of the triangle are given, and there is no

mention of height of the triangle, we can use Heron’s formula to

calculate the are.

Perimeter of the given triangle = a + b + c

Semi perimeter (s) = = + +
2 2

Heron’s formula to find area of triangle

Area of triangle = √ ( − )( − )( − )