Question

A polygon is regular if each of its sides has the same length. Find the perimeter of the regular polygon.​

Answer 1

7.5 or 15/2

Explanation:

Since the sides length are equal,

3(x-1) = 3x - 3 = 5x - 6

2x = 3 ==> x = 3/2

==> side length = 3 * (1.5 - 1) = 1.5

==> perimeter = 5 * 1.5 = 7.5