Angle Relationships

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 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 does adjacent angles mean?

Back

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

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.

Front

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

Back

60 degrees, because 30 + 60 = 90.

Front

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

Back

60 degrees, because 120 + 60 = 180.

Front

What equation represents the relationship of complementary angles?

Back

Front

What equation represents the relationship of supplementary angles?

Back

Front

Identify the vertical angle to angle 7.

Back

Angle 9 is the vertical angle to angle 7.