Question

The central angle of each part is:

• A. ${60}^{\circ }$
• B. ${30}^{\circ }$
• C. ${45}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is B ${30}^{\circ }$

You can clearly see the circle is divided into $12$ equal parts.

Total Central angle $={360}^{\circ }$

Let measure of central angle $=x$

$\Rightarrow 12\left(x\right)={360}^{\circ }\Rightarrow 12x={360}^{\circ }\Rightarrow x=\frac{{360}^{\circ }}{12}\Rightarrow x={30}^{\circ }$

So option $B$ is correct.