If two vertical angles are supplementary, what is the measure of each angle? a. 50° b. 90° c. 180° d. 45°

b. 90°

Step-by-step explanation:

Vertical angles are equal

therefore ∠1 = ∠2

Supplementary = 180 °

90 + 90 = 180

answer for #1 is c

answer for #2 is d

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c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.