Question

An isosceles triangle has perimeter 3ocm and EACHof the equal side is 12cm find the the area of of the triangle

Answer 1

Answer:

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

mark it as branlist

..follow me pls..