An isosceles triangle has a perimeter …
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Yogita Ingle 4 years, 7 months ago
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
{tex}Sq Root(15(15-12)(15-12)(15-6) ) = Sq Root(15*3*3*9) = Sq Root(1215) = 34.85 cm^2{/tex}
So Area is {tex}34.85cm^2{/tex}
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