Question

The order of rotational symmetry of a regular pentagon is 5. What is the angle of rotation?

• A. ${62}^{\circ }$
• B. ${90}^{\circ }$
• C. ${70}^{\circ }$
• D. ${72}^{\circ }$

Answer 1

The correct option is D ${72}^{\circ }$

Angle of rotational symmetry = $\frac{360}{Orderofrotationalsymmetry}$
Given Order of Rotational symmetry = 5.
Hence Angle of rotational symmetry =$\frac{360}{5}$ = ${72}^{\circ }$