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2 cards from this section. Quick, good the night before a test.
What defines complementary angles?
Think about what two angles can add up to for them to be complementary.
If two angles are supplementary and one measures 100°, what is the other?
Recall the definition of supplementary angles.
What are the measures of complementary angles?
Recall the angle relationship definitions.
If two lines intersect, are the vertically opposite angles equal?
Reflect on the theorems discussed in this section.
Prove that if three angles are supplementary, and one angle measures 40°, what are the other two?
Use the supplementary angle definition.
Create a diagram of intersecting lines and label all angles. Prove that the vertically opposite angles are equal in your construction.
Use physical objects if necessary to visualize.
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