Question

Two angles are supplementary. The first angle measures 40°. What is the measurement of the second angle?

A. 50°
B. 140°
C. 120°
D. 60°


6. Which of the following best describes a plane?
A. The point of intersection of two walls
B. The edge of a desk
C. The surface of a flat table
D. A curve in a road

Answer 1

The first answer would be B 140 as supplementary angles add up to 180.

The next answer would be the surface of a flat table.

Answer 2

Supplementary angles add up to 180°.
If one is 40°, then the other is (180° - 40°) = 140° .

None of those choices describes a plane.
Choice 'C' is the only example of a plane.