Question

what is the perimeter of an isosceles triangle in which the equal sides are 4cm each and the third side is 7cm​

Answer 1

Let the other side of triangle is x cm

Then in isosceles right angle triangle two congruent sides are 7 cm

x2=(7)2+(7)2

⇒x2=49+49

⇒x2=198

⇒x=72

Then perimeter of right angle isosceles triangle =7+7+72=14+72=7(2+2) 

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