Question

the two side of isosceles triangle is 6cm and its perimeter is 21cm find the third side​

Answer 1

Answer:

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● Given:-

☆ Two sides of an isosceles triangle is 6 cm.

☆ Perimeter is 21 cm.

● To find:-

☆ Third side of the triangle.

● Solution:-

We know that,

Perimeter = Sum of three sides of a triangle.

And in an isosceles triangle both sides are same.

According to question:-

21 = 6+6+ Third side

or, 21 = 12+ Third side.

or, Third side = 21-12 cm

So, Third side = 9 cm.

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