Question

the perimeter of isosceles triangle is 42cm. if one of its equal side is 10cm find the third side of the triangle ​

Answer 1

Step-by-step explanation:

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Answer 2

Perimeter of triangle =28 -(given)

Perimeter of triangle=sum of all (three) sides

Let's take 3 sides are a,b,c

Given that, triangle is isosceles

Hence 2 sides are equal let's take a & b are two equal sides of triangle (a=b ) then ,

a+b+c=28 but,

a=b therefore

2a+c=28

Put a=b=10

We get

C=8-third side of triangle

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