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 vertical angles?

Back

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

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 of two angles that add up to 180 degrees?

Back

They are supplementary.

Front

What is the relationship of two angles that are equal and opposite each other?

Back

They are vertical angles.

Front

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

Back

45 degrees (90 - 45 = 45).

Front

If angle D is 150 degrees, what is the measure of its supplementary angle?

Back

30 degrees (180 - 150 = 30).

Front

What is the sum of the measures of complementary angles?

Back

90 degrees.