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5 cards from this section. Quick, good the night before a test.
What is the measure of an angle that is complementary to a 40° angle?
Remember complementary means they sum to 90°.
If two angles are supplementary and one measures 120°, what is the other angle?
They must total 180°.
What do complementary angles sum to?
Think about the meaning of 'complementary'.
True or False: Vertically opposite angles are always equal.
Visualize two crossing lines and their angles.
If angle A and angle B are a linear pair and angle A measures 70 degrees, what are the measures of angle B and also the measure of angle C, which is vertically opposite angle B?
Add to 180° for the linear pair, then find the opposite.
Given that angles A and B are supplementary and angle A is twice the measure of angle B, find the measures of angles A and B.
Translate the relationship into an equation based on the sum.
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