Question

an isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm.find the area of the triangle? ​

Answer 1

Step-by-step explanation:

The perimeter of an isosceles triangle is 30 cm (Given).

The length of the sides which are equal is12 cm.

Let the third side length be 'a cm'.

Then, Perimeter = a+b+c

\Rightarrow 30= a+12+12

\Rightarrow a = 6cm

So, the semi-perimeter of the triangle is given by,

continue in image

Answer 2

Area= base × height /2

If perimeter is 30 cm and each sides are 12 cm

then

12 +12 +6 =30

base =6

height =12

A = 6×12/2

A = 36

Hope's it help you