Angle Relationships

Front

What is the definition of complementary angles?

Back

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

Front

What is the definition of 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.

Front

What is the measure of angle x if it is complementary to a 39-degree angle?

Back

Angle x = 90 - 39 = 51 degrees.

Front

What is the measure of angle b if it is supplementary to a 120-degree angle?

Back

Angle b = 180 - 120 = 60 degrees.

Front

What is the measure of angle b if it is supplementary to a 134-degree angle?

Back

Angle b = 180 - 134 = 46 degrees.

Front

What is the definition of alternate interior angles?

Back

Alternate interior angles are pairs of angles on opposite sides of a transversal but inside the two lines.

Front

What is the definition of corresponding angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines in relation to a transversal.

Front

What is the definition of alternate exterior angles?

Back

Alternate exterior angles are pairs of angles on opposite sides of a transversal but outside the two lines.