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1. When the sum of the measures of two angles is 90°, the angles are called
A. supplementary angles
B. complementary angles
C. adjacent angles
D. vertically opposite angles
2. The sum of the measures of two complementary angles is
A. 180°
B. 60°
C. 45°
D. 90°
3. The measure of the complement of the angle 30° is
A. 30°
B. 16°
C. 60°
D. 160°
4. Which of the following statements is true?
A. Two acute angles can be complementary to each other
B. Two obtuse angles can be complementary to each other
C. Two right angles can be complementary to each other
D. One obtuse angle and one acute angle can be complementary to each other
5. The measure of the angle which is equal to its complement is
A. 30°
B. 60°
C. 45°
D. 90°
6. Which of the following pairs of angles is not a pair of complementary angles?
A. 60°, 30°
B. 66°, 34°
C. 0°, 90°
D. 35°, 55°
7. When the sum of the measures of two angles is 180°, the angles are called
A. adjacent angles
B. complementary angles
C. vertically opposite angles
D. supplementary angles
8. The sum of the measures of two supplementary angles is
A. 90°
B. 180°
C. 360°
D. none of these
9. The measure of the supplement of the angle 120° is
A. 30°
B. 45°
C. 60°
D. 90°
10. Which of the following statements is true?
A. Two acute angles can be supplementary.
B. Two right angles can be supplementary.
C. Two obtuse angles can be supplementary.
D. One obtuse angle and one acute angle cannot be supplementary
14. In the following figure, l || m. Find the measure of ∠ x.
A. 60°
B. 45°
C. 30°
D. none of these
18. Find the measure of the angle which is half of its supplementary angle?
A. 60°
B. 120°
C. 90°
D. 45°
19. Find the measure of the angle which is double of its complementary angle?
A. 60°
B. 30°
C. 45°
D. 120°
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