Question

if an angle is bisected to form two new 20° angles, what was the measure of the original angle?

Explanation:

Step1: Recall angle - bisection concept

An angle bisector divides an angle into two equal - sized angles.
Let the original angle be $\theta$. If it is bisected into two angles each of measure $20^{\circ}$, then $\theta$ is the sum of these two angles.

Step2: Calculate the original angle

$\theta=20^{\circ}+20^{\circ}$

Answer:

$40$