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.
Since, perimeter = Length of one side multiplied by the number of sides
$\Rightarrow 12.5=2.5\times z$
$\Rightarrow z=\frac{12.5}{2.5}$
$=\frac{12.5}{2.5}\times \frac{10}{10}$
$=\frac{125}{25}$
$\therefore z=5$
Thus, the polygon has 5 sides.