Question

Two streets form an intersection. ∠C and ∠D are vertical angles. If the measure of ∠C is (x + 16°) and the measure of ∠D is (4x − 5⋅).What is the measure of ∠D?

2.75°

8°

23°

33.8°

Answer 1

the measure of ∠D is 8°.

Explanation:

Since ∠C and ∠D are vertical angles, they have equal measure. So we can set their measures equal to each other and solve for x:

x + 16° = 4x - 5°

6x = 21°

x = 3.5°

Now we can find the measure of ∠D:

∠D = 4x - 5°

∠D = 4(3.5°) - 5°

∠D = 8°

Therefore, the measure of ∠D is 8°.