Question

What would the answer to this question be?
A. 40°
B. 60°
C. 80°
D. 100°

Answer 1

D. 100°

Explanation:

A straight line is 180°. Add 50° and 30° (which is 80°) and subtract the total from 180°.

50 + 30 = 80

180 - 80 = 100

Answer 2

These angles form a straight line, so they are supplementary angles.

We know that, supplementary angles form 180°.

`50 + x + 30 = 180 \\ 50 + 30 + x = 180 \\ 80 + x = 180 \\ x = 180 - 80 \\ x = 100`

=> So, the missing angles is 100°