Parallel Lines and Transversals

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.

Front

What are skew lines?

Back

Lines that do not intersect and are not parallel, existing in different planes.

Front

What is a transversal?

Back

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

Front

What are same-side interior angles?

Back

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

Front

What are 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

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

Back

If two parallel lines are cut by a transversal, the same-side interior angles are supplementary.

Front

If m∠1 = (7x + 13)° and m∠2 = (13x + 47)°, what is the measure of ∠2 when lines are parallel?

Back

125°

Front

What is the sum of the measures of the angles formed by a transversal intersecting two parallel lines?

Back

The sum is 360°.