Angle Relationships

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines cut by a transversal; they are equal.

Front

If angle A is 70°, what is the measure of its supplementary angle?

Back

110° (180° - 70° = 110°).

Front

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

Back

60° (90° - 30° = 60°).

Front

Find the value of x if angle C is 45° and it is supplementary to angle D.

Back

135° (180° - 45° = 135°).

Front

Find the value of x if angle E is 60° and it is complementary to angle F.

Back

30° (90° - 60° = 30°).

Front

If two angles are vertical angles and one measures 40°, what is the measure of the other angle?

Back

40° (vertical angles are equal).

Front

If two corresponding angles are equal and one measures 75°, what is the measure of the other angle?

Back

75° (corresponding angles are equal).