Angles & Angle Relationships

Front

What are adjacent angles?

Back

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

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

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

Back

An obtuse angle.

Front

What is the sum of the measures of complementary angles?

Back

The sum of the measures of complementary angles is 90 degrees.

Front

What is the sum of the measures of supplementary angles?

Back

The sum of the measures of supplementary angles is 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 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 is the relationship between angles that are formed by two intersecting lines?

Back

The angles formed by two intersecting lines are called vertical angles and are equal, and adjacent angles are supplementary.

Front

What is an acute angle?

Back

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

Front

What is the definition of a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.