Parallel Lines and Transversals

Front

What are parallel lines?

Back

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

Front

What is a transversal?

Back

A line that intersects two or more lines at different points.

Front

Define corresponding angles.

Back

Angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

What are alternate exterior angles?

Back

Angles that are on opposite sides of the transversal and outside the two lines.

Front

Define same-side interior angles.

Back

Angles that are on the same side of the transversal and inside the two lines.

Front

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

Back

Corresponding angles are equal.

Front

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

Back

Alternate interior angles are equal.

Front

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

Back

Alternate exterior angles are equal.

Front

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

Back

Same-side interior angles are supplementary (add up to 180 degrees).