Angles of Parallel Lines

Front

What are corresponding angles?

Back

Pairs of angles that are in the same relative position at the intersection of two lines and on the same side of the transversal.

Front

What is an example of a pair of complementary angles?

Back

81° and 9°.

Front

What is the angle relationship for x and y if they are alternate exterior angles?

Back

x and y are angles that lie outside the two lines and on opposite sides of the transversal.

Front

Which pair of angles represents corresponding angles when two parallel lines are cut by a transversal?

Back

Front

When are two lines considered parallel?

Back

Two lines are considered parallel if they never intersect and have the same slope.

Front

What are alternate interior angles?

Back

Angles that lie between two lines and on opposite sides of the transversal.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

What are same side interior angles?

Back

Angles that lie between two lines and on the same side of the transversal.

Front

If two lines are cut by a transversal and the corresponding angles are equal, what can be concluded?

Back

The two lines are parallel.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.