Angle Relationships

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

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

Front

What are adjacent angles?

Back

Angles that share a common side and vertex but do not overlap.

Front

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

Back

60 degrees.

Front

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

Back

60 degrees.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

What type of angle measures less than 90 degrees?

Back

Acute angle.

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Front

If angle 1 and angle 2 are vertical angles and angle 1 measures 45 degrees, what is the measure of angle 2?

Back

45 degrees.