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Find the area of an isosceles …

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Find the area of an isosceles triangle, whose equal sides are of length 15 cm each and third side is 12 cm.

Posted by Nishant Choudhary 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Devansh Gala 4 years, 11 months ago

Side 1:- 15cm Side 2:- 15cm Side 3:- 12cm Perimeter:- 15 + 15 + 12 = 42cm Semi - Perimeter:- 42/2 = 21cm Area:- √S(S - A)(S - B)(S - C) = √21(21 - 15)(21 - 15)(21 - 12) = √21 * 6 * 6 * 9 = √6804 = 82.42sq cm.

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