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An isosceles triangle has a perimeter …

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An isosceles triangle has a perimeter 30cm and each of the equal sides is 12 cm. Find the area of the triangle

Posted by Gyan Chaudhary 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 11 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}

ANSWER

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