Question

In triangle ABC, AB=5cm, BC=7cm and CA= 12cm.What is the area of the triangle using Heron's formula?

Answer 1

s=a+b+c/2

5+7+12/2=12

HERON S FORMULA ROOT S(S-A )(S-B) (S-C)
12(12-5)(12-7)(12-12)

THE AREA OF TRIANGLE WILL BE ZERO.

NOTE.THE SUM OF TWO SIDE OF A TRIANGLE SHOULD BE GREATER THAN THIRD