Question

Find the area of isosceles triangle is 12cm2. if one of equal side is 5 cm . find its base

Answer 1

Both sides are 5.
The base is x
The area is (1/2)x h=12 
xh=24
The height is one leg of a right triangle, half the base another leg, and the hypotenuse is 5.
This has to be a 3-4-5 right triangle.
The base is 3, but that is the base of half of the isosceles triangle. The whole base is 6.
The height is 4 in any case. 
The area is (1/2)*24=12 cm^2
The height is 4 cm, the base 6c

Answer 2

Both sides are 5.

The base is x

The area is (1/2)x h=12 

xh=24

The height is one leg of a right triangle, half the base another leg, and the hypotenuse is 5.

This has to be a 3-4-5 right triangle.

The base is 3, but that is the base of half of the isosceles triangle. The whole base is 6.

The height is 4 in any case. 

The area is (1/2)*24=12 cm^2

The height is 4 cm, the base 6c