Angle Pairs

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles whose non-common sides form a straight line. The sum of the angles in a linear pair is always 180 degrees.

Front

What are supplementary angles?

Back

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

Front

What are complementary angles?

Back

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

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 does it mean for angles to be adjacent?

Back

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

Front

If angle A measures 118 degrees, what is the measure of its supplementary angle?

Back

62 degrees, because 180 - 118 = 62.

Front

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

Back

60 degrees, because 90 - 30 = 60.

Front

Identify the relationship: If angle 1 and angle 2 are adjacent and their measures add up to 180 degrees, what type of angles are they?

Back

They are supplementary angles.

Front

Identify the relationship: If angle 3 and angle 4 are vertical angles, what can be said about their measures?

Back

They are equal in measure.

Front

What is the measure of angle 5 if it is complementary to angle 6, which measures 45 degrees?

Back

Angle 5 measures 45 degrees, because 90 - 45 = 45.