Question

Which of these angles are supplementary?

A. 100o and 90o

B. 78o and 102o

C. 54o and 146o

D. 12o and 78o

Answer 1

Answer: B. 78 degrees and 102 degrees

Answer 2

B

Explanation:

Supplementary angles add to 180 degrees. Add each of the angles to see if they add to 180.

A. 100 + 90 = 190 NO

B. 78 + 102 = 180 YES

C. 54 + 146 = 200 NO

D. 12 + 78 = 90 NO