Angle Relationships

Front

What are adjacent angles?

Back

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

Front

What are complementary angles?

Back

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

Front

What are 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 corresponding angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines cut by a transversal.

Front

What are same side interior angles?

Back

Same side interior angles are pairs of angles on the same side of the transversal and inside the two lines.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

If angle A is 60 degrees, what is the measure of its complementary angle?

Back

The complementary angle is 30 degrees, since 60 + 30 = 90.