Parallel Lines cut by a Transversal Review

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines (usually parallel lines).

Front

What are vertical angles?

Back

Vertical angles are a pair of opposite congruent angles formed by intersecting lines.

Front

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

Back

Alternate interior angles are congruent.

Front

If m∠12 = 74°, what is m∠4 if they are corresponding angles?

Back

m∠4 = 74° because they are corresponding angles.

Front

What is the measure of angle Y if a diagonal brace makes a 50° angle with the wire?

Back

m∠Y = 130° because it is supplementary to the 50° angle.

Front

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

Back

Corresponding angles are congruent.

Front

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

Back

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

Front

If two lines are cut by a transversal and the alternate exterior angles are congruent, what can be concluded about the lines?

Back

The lines are parallel.

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

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

Back

Consecutive interior angles are supplementary, meaning their measures add up to 180°.