What is the perimeter of a regular pentagon if each side is 9 cm?

Step-by-step solution

1. Compute the perimeter of a regular polygon by multiplying the side length by the number of sides.
2. A pentagon has 5 sides, so $9\text{ cm}\times 5=45\text{ cm}$.

Concept tested: Perimeter of regular polygon

Published 13 October 2026 · How this solution was prepared and checked