G Ch. 3 (sections 1, 3, 4, 5)

Front

What does perpendicular mean?

Back

Lines cross at 90 degrees.

Front

Name a line perpendicular to AD.

Back

AB.

Front

What are parallel lines?

Back

Two lines that never cross.

Front

Name the angle relationship when two lines are cut by a transversal and the angles in the same position on different lines are equal.

Back

Corresponding.

Front

What kinds of lines are pictured if they intersect at a right angle?

Back

Perpendicular.

Front

What is the definition of intersecting lines?

Back

Lines that cross each other.

Front

What is the definition of skew lines?

Back

Lines that do not intersect and are not parallel.

Front

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

Back

They are equal.

Front

What is the definition of vertical angles?

Back

Angles opposite each other when two lines intersect; they are equal.

Front

If two lines are parallel, what can be said about the angles formed when a transversal crosses them?

Back

Alternate exterior angles are equal.