Ontario Curriculum Expectation:
6.E2.3 use the properties of supplementary angles, complementary angles, opposite angles, and interior and exterior angles to solve for unknown angle measures.
Two intersecting lines create a pair of opposite angles. Opposite angles are equal.
In the figure below, two straight lines intersect to create a matching pair of opposite angles.
∠a and ∠b are opposite angles, so they have the same measurement.
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1 of 101. Question
1. Fill in the blanks with the names of the angles to identify the pairs of opposite angles.
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Angle and angle are opposite angles.
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2 of 102. Question
2. Fill in the blanks with the names of the angles to identify the pairs of opposite angles.
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Angle and angle are opposite angles.
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3 of 103. Question
3. Fill in the blanks with the names of the angles to identify the pairs of opposite angles.
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Angle and angle are opposite angles.
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4 of 104. Question
4. Identify the pairs of opposite angles.
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5 of 105. Question
5. Identify the pairs of opposite angles.
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6 of 106. Question
6. What is the measurement of the unknown angle?
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7 of 107. Question
7. What is the measurement of the unknown angle?
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Unknown angle: °
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8 of 108. Question
8. What is the measurement of the unknown angle?
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Unknown angle: °
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9 of 109. Question
9. What are the measurements of both unknown angles?
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10 of 1010. Question
10. What are the measurements of both unknown angles?
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