Question

Angles to be bisected to obtain an angle of ${90}^{\circ }$ are:

• A. ${60}^{\circ }$
• B. ${60}^{\circ }$ and ${120}^{\circ }$
• C. ${120}^{\circ }$ and ${180}^{\circ }$
• D. $0^{\circ }$ and ${60}^{\circ }$

Answer 1

The correct option is B ${60}^{\circ }$ and ${120}^{\circ }$

Angles to be bisected to obtain an angle of ${90}^{\circ }$ are ${60}^{\circ }$ and ${120}^{\circ }$ as it exactly lies between these two angles.

$\frac{{60}^{\circ }+{120}^{\circ }}{2}={90}^{\circ }$

Hence, option $B$.