The perimeter of an isosceles triangle with equal sides $6$ cm each and third side _ cm is $22$ cm.

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Solution

$P e r i m e t e r o f a n I s o s c e l e s T r i a n g l e = 2 a + b (w h e r e a i s e q u a l s i d e s a n d b i s u n e q u a l s i d e) A c c o r d i n g t o Q u e s t i o n 22 = (2 x 6 + a) 22 = 12 + a a = 22 - 12 = 10 c m T h i r d s i d e o f t h e i s o s c e l e s t r i a n g l e i s 10 c m$

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