Question

How many angles of rotation a regular polygon will have if it has ‘n’ sides?

• A. $n$
• B. $n-1$
• C. $n+1$
• D. $\frac{n}{2}$

Answer 1

The correct option is B

$n-1$

Angles of rotation of a regular polygon with ‘n’ sides = Y = n – 1

This is because the last rotation, i.e. ${360}^{\circ }$ is not counted as an angle of rotation. If it was counted as an angle of rotation, every object would have an angle of rotation.

So, angles of rotation for a square are ${90}^{\circ }$, ${180}^{\circ }$ and ${270}^{\circ }$. It’s only 3, not 4.