Question

Each side of a regular polygon is 2.5 cm in length. The perimeter of the polygon is 12.5 cm. How many sides does the polygon have?

Answer 1

The perimeter of a regular polygon is the sum of the lengths of all its equal sides = 12.5 cm.

Length of each side = 2.5 cm.
Thus, the number of sides $=$ $\frac{12.5}{2.5}$ $=$$\frac{125}{25}$ $=5$

The polygon has 5 sides.