Question

If the perimeter of a regular octagon is $72cm$, then its side is

• A. $6cm$
• B. $8cm$
• C. $9cm$
• D. $12cm$

Answer 1

The correct option is C

$9cm$

Explanation for the correct option:

Let us take the side length of the regular octagon is $a$.

The perimeter of a regular octagon = $8\times a=72cm$

$a=\frac{72}{8}$

$a=9cm$

Therefore the side of the regular octagon having the perimeter $72cm$is $9cm$.

Hence, option (C) is the correct answer.