Question

the measure of ∠b is 68°. what is the measure of its supplementary angle? 22° 90° 112° 180°

Explanation:

Step1: Recall supplementary - angle definition

Two angles are supplementary if their sum is 180°. Let the measure of the supplementary angle of ∠B be x. Then ∠B + x=180°.

Step2: Substitute the value of ∠B

Given ∠B = 68°, we have 68°+x = 180°.

Step3: Solve for x

x=180° - 68°=112°.

Answer:

C. 112°