Vertical, Complementary, Supplementary, and Adjacent Angles

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

If one angle measures 30°, what is its complement?

Back

60°

Front

If two angles are supplementary and one measures 110°, what is the other angle?

Back

70°

Front

What is the measure of vertical angles if one angle is 40°?

Back

40° (vertical angles are equal).

Front

If ∠A and ∠B are complementary and ∠A = 45°, what is ∠B?

Back

45° (since 45° + 45° = 90°).

Front

What is the relationship between adjacent angles?

Back

Adjacent angles share a common side and vertex and are next to each other.

Front

If two angles are vertical, what can we say about their measures?

Back

They are equal.