Parallel Lines Angle Relationships

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the definition of same side interior angles?

Back

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

Front

What is the definition of corresponding angles?

Back

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

Front

What is the relationship between same side interior angles when lines are parallel?

Back

When two parallel lines are cut by a transversal, same side interior angles are supplementary.

Front

What is the relationship between corresponding angles when lines are parallel?

Back

When two parallel lines are cut by a transversal, corresponding angles are congruent.

Front

What is the angle relationship of alternate interior angles when lines are parallel?

Back

When two parallel lines are cut by a transversal, alternate interior angles are congruent.

Front

What is the angle relationship of alternate exterior angles when lines are parallel?

Back

When two parallel lines are cut by a transversal, alternate exterior angles are congruent.

Front

How can you identify parallel lines using angle relationships?

Back

If a transversal intersects two lines and the corresponding angles are congruent, the lines are parallel.