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 relationship between angles formed by parallel lines and a transversal?

Back

Angles formed by parallel lines and a transversal have specific relationships, including corresponding angles, alternate interior angles, alternate exterior angles, and same-side interior angles.

Front

What are corresponding angles?

Back

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

Front

What are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What are same-side interior angles?

Back

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

Front

What is the sum of the measures of supplementary angles?

Back

The sum of the measures of supplementary angles is 180 degrees.

Front

If two angles are supplementary, what can be said about their measures?

Back

If two angles are supplementary, their measures add up to 180 degrees.

Front

What is the measure of angle x if it is supplementary to an angle measuring 74 degrees?

Back

Angle x measures 106 degrees because 180 - 74 = 106.

Front

What is the relationship between same-side interior angles when parallel lines are cut by a transversal?

Back

Same-side interior angles are supplementary when parallel lines are cut by a transversal.