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

Let The Third Side Be xcm.

Now Perimeter = 12+12+x 

24+x = 30

x = 6

Now Find The Area Using Herons Formula

Semiperimeter = 30/2 = 15

Sq Root(15(15-12)(15-12)(15-6) ) = Sq Root(15*3*3*9) = Sq Root(1215) = 34.85 cm^2

So Area is 34.85cm^2

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