Question

Two equal sides of an isosceles triangle are $3x-1$ and $2x+2$ units. The third side is $2x$ units find x and the perimeter of the triangle.

Answer 1

In isosceles triangle two sides are equal,

So,

3x-1=2x+2

x=3

Perimeter=sum of all sides

=3x-1+2x+2+2x

=7x+1

Substituting value of x

Perimeter=7(3)+1

=21+1

=22

Thus x=3 and Perimeter of a triangle=22 square units

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