Question

The triangle and rectangle have an equal perimeter x+5 for the triangle and 2x-3 for the rectangle

Answer 1

Perimeter of triangle = 3(x + 5).

Perimeter of rectangle = 2(2x - 3) + 2x

We know that 3(x + 5) = 2(2x - 3) + 2x

So 3x + 15 = 4x - 6 + 2x, 3x = 21, x = 7.

Hence perimeter = 3(7 + 5) = 36.

Explanation: