Two angles are supplementary. If one angle measures 65°, what is the measure of the other angle?
- 25°
- 35°
- 115°
- 295°
Testinar Grade 7 math
Angle Relationships: Supplementary, Complementary, and Vertical Angles
Students will build Grade 7 mastery of angle relationships: supplementary, complementary, and vertical angles using models, equations, and test-style reasoning.
CH06-06
Geometry and Scale
- Name
- Date
- Score
- ____ / 8
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Two rays form a right angle, and a third ray splits it into complementary angles. One angle measures 34°. What is the measure of angle \(x\)?
- 56°
- 34°
- 90°
- 124°
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Two straight lines intersect. One angle formed is 50°. What is the measure of the angle marked \(y\)?
- 130°
- 90°
- 50°
- 140°
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Two lines intersect forming vertical angles. One angle is 72°. What is the measure of the vertically opposite angle \(a\)?
- 18°
- 72°
- 108°
- 180°
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Two angles form a linear pair. One angle measures 91°. What is the measure of the other angle?
- 1°
- 89°
- 45°
- 179°
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A ray splits a straight angle into two adjacent angles. One angle is 70°. Find the measure of angle \(b\).
- 20°
- 70°
- 110°
- 180°
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If angle \(x\) and angle \(y\) are complementary, and \(x=37°\), what is \(y\)?
- 53°
- 43°
- 37°
- 143°
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Two lines intersect. One angle measures 63°. What is the measure of the vertically opposite angle \(d\)?
- 27°
- 63°
- 117°
- 153°
Answer key and explanations
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C. 115°
Supplementary angles sum to 180°: \(180-65=115°\).
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A. 56°
Complementary angles sum to 90°: \(x=90-34=56°\).
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A. 130°
Adjacent angles on a straight line are supplementary: \(y=180-50=130°\).
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B. 72°
Vertical angles are equal, so the opposite angle is also 72°.
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B. 89°
A linear pair is supplementary: \(180-91=89°\).
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C. 110°
Angles on a straight line are supplementary: \(180-70=110°\).
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A. 53°
Complementary angles sum to 90°: \(y=90-37=53°\).
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B. 63°
Vertical angles are equal. The angle opposite 63° is 63°.
