Properties of Parallel Lines

Front

What are parallel lines?

Back

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

Front

What is the Corresponding Angles Postulate?

Back

If two parallel lines are cut by a transversal, then each pair of corresponding angles is congruent.

Front

What are Alternate Interior Angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines; they are congruent.

Front

What are Alternate Exterior Angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines; they are congruent.

Front

What are Consecutive Interior Angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines; they are supplementary.

Front

If angle 5 is 65°, what is the measure of angle 1 if lines are parallel?

Back

Angle 1 is also 65° (corresponding angles).

Front

If angle 4 is 115°, what is the measure of angle 8 if lines are parallel?

Back

Angle 8 is also 115° (corresponding angles).

Front

What is the sum of the interior angles on the same side of the transversal?

Back

The sum is 180° (consecutive interior angles are supplementary).

Front

If angle b is 83°, what is the measure of angle 3 if lines are parallel?

Back

Angle 3 is also 83° (alternate interior angles).

Front

What equation represents the relationship between angles 5 and 4 if they are supplementary?

Back

Angle 5 + Angle 4 = 180°.