Parallel Lines Cut by a Transversal

Front

What are parallel lines?

Back

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

Front

What is a transversal?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What are corresponding angles?

Back

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

Front

What are alternate interior angles?

Back

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

Front

What are same side interior angles?

Back

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

Front

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

Back

When the lines are parallel, alternate interior angles are congruent.

Front

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

Back

When the lines are parallel, corresponding angles are congruent.

Front

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

Back

When the lines are parallel, same side interior angles are supplementary.

Front

How do you find the measure of an angle when given its relationship to another angle?

Back

Use the properties of angle relationships (e.g., congruence or supplementary) to set up an equation and solve for the unknown angle.