Adjacent, Vertical, Complementary, Supplementary Angles

Front

What are adjacent angles?

Back

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

Front

Define vertical angles.

Back

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

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

If angle A is 30 degrees, what is the measure of its complementary angle?

Back

60 degrees (90 - 30 = 60).

Front

If angle B is 120 degrees, what is the measure of its supplementary angle?

Back

60 degrees (180 - 120 = 60).

Front

What is the relationship between two angles that are both 45 degrees?

Back

They are complementary angles because they add up to 90 degrees.

Front

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

Back

They are equal in measure.

Front

If angle C is 70 degrees, what is the measure of its supplementary angle?

Back

110 degrees (180 - 70 = 110).

Front

What is the sum of the measures of two complementary angles?

Back

90 degrees.