Angle pairs

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

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

Back

60 degrees, because 90 - 30 = 60.

Front

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

Back

60 degrees, because 180 - 120 = 60.

Front

If angle 1 and angle 2 are supplementary and angle 1 is 70 degrees, what is angle 2?

Back

110 degrees, because 180 - 70 = 110.

Front

If angle 3 and angle 4 are vertical angles and angle 3 is 45 degrees, what is angle 4?

Back

45 degrees, because vertical angles are equal.

Front

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

Back

90 degrees.

Front

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

Back

180 degrees.