angle

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is a right angle?

Back

A right angle measures 90 degrees.

Front

What is an acute angle?

Back

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

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 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. They are equal.

Front

What are alternate interior angles?

Back

Alternate interior angles are angles that are on opposite sides of the transversal and inside the two parallel lines. They are equal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are angles that are on opposite sides of the transversal and outside the two parallel lines. They are equal.

Front

What is a linear pair?

Back

A linear pair is a pair of adjacent angles that form a straight line. They are supplementary.

Front

How do you identify congruent angles?

Back

Congruent angles are angles that have the same measure.