Question

If the m∠ A = 110°. What is m∠A'?
A. 70°
B. 90°
C. 110°
D. 130°

Answer 1

The measure of ∠A' is 70°.

Step-by-step explanation:

To find the measure of ∠A', we need to determine the measure of the angle that is supplementary to ∠A.

Since the sum of the measures of two supplementary angles is 180°, we can subtract the measure of ∠A from 180° to

find ∠A'.

∠A' = 180° - 110° = 70°

Therefore, the measure of ∠A' is 70° which is option A.