Parallel Lines (Part 1)

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

What is a transversal?

Back

A transversal is a line that passes through two or more lines in the same plane at different points.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between two lines and on opposite sides of a transversal.

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

Alternate interior angles are equal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that lie outside two lines and on opposite sides of a transversal.

Front

What is the relationship between alternate exterior angles when two parallel lines are cut by a transversal?

Back

Alternate exterior angles are equal.

Front

What are consecutive (same-side) interior angles?

Back

Consecutive interior angles are pairs of angles that lie between two lines and on the same side of a transversal.

Front

What is the relationship between consecutive interior angles when two parallel lines are cut by a transversal?

Back

Consecutive interior angles are supplementary (add up to 180 degrees).

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.