3.1 Pairs of Lines and Angles

Front

What are parallel lines?

Back

Two lines that never cross.

Front

What are skew lines?

Back

Lines that do not intersect and are not parallel.

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines when cut by a transversal.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

What are consecutive interior angles?

Back

Angles that are on the same side 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

If two parallel lines are cut by a transversal, what can be said about the corresponding angles?

Back

They are equal.

Front

If two lines are perpendicular, what is the measure of the angles formed?

Back

Each angle measures 90 degrees.

Front

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

Back

They are supplementary (add up to 180 degrees).

Front

Name a line parallel to line AD.

Back

Line EH.