Question

Prove that Area of triangle ABC=1/2(perimeter of triangle ABC)*R

Answer 1

Hey mate!!! Where is the triangle ABC?? There is no any figure

Answer 2

Area of llgm =base×heght

half of llgm forms a triangle

whose are is =1/2×b×h

it is taken llgm,,, becoz all figures with opp. sides equal are llgm