Adjacent, Vertical, Complementary, Supplementary Angles

Front

What are complementary angles?

Back

Complementary angles are two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite of each other when two lines intersect; they are congruent.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex.

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 110 degrees, what is the measure of its supplementary angle?

Back

70 degrees (180 - 110 = 70).

Front

What is the sum of two complementary angles?

Back

The sum is always 90 degrees.

Front

What is the sum of two supplementary angles?

Back

The sum is always 180 degrees.

Front

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

Back

They are equal (congruent).

Front

If angle C is 45 degrees, what is the measure of its complementary angle?

Back

45 degrees (90 - 45 = 45).