Parallel Lines & Transversals - Writing Equations

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet or intersect, no matter how far they are extended.

Front

What is a transversal?

Back

A transversal is a line that crosses at least two other lines in the same plane.

Front

What is the sum of the interior angles on the same side of a transversal when intersecting parallel lines?

Back

The sum of the interior angles on the same side of a transversal is 180 degrees.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a transversal crosses two lines.

Front

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

Back

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

Front

What are alternate interior angles?

Back

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

Front

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

Back

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

Front

What are consecutive interior angles?

Back

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

Front

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

Back

When two parallel lines are cut by a transversal, consecutive interior angles are supplementary (sum to 180 degrees).

Front

How do you set up an equation for corresponding angles?

Back

Set the measures of the corresponding angles equal to each other.