Question

Each side of a rectangular 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

Length of each side of the polygon = 2.5 cm

Perimeter of the polygon = 12.5 cm

Let the number of sides of the polygon be z.

$\therefore$ 2.5 $\times$ z = 12.5 ( Perimeter = Length of one side multiplied by the number of sides)
or, z = $$\begin{gathered} \frac{12.5}{2.5} \\ =5 \end{gathered}$$

Thus, the polygon has 5 sides.