Geo2.2 Proving Lines Parallel-

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet; they 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 equal.

Front

What are Alternate Interior Angles?

Back

Alternate interior angles are pairs of angles that lie between two lines and on opposite sides of a transversal.

Front

What is the Alternate Interior Angles Theorem?

Back

If two parallel lines are cut by a transversal, then each pair of alternate interior angles is equal.

Front

What are Consecutive Interior Angles?

Back

Consecutive interior angles are pairs of angles that lie on the same side of the transversal and between the two lines.

Front

What does it mean if Consecutive Interior Angles are supplementary?

Back

If the sum of the measures of consecutive interior angles is 180 degrees, then the two lines are parallel.

Front

How do you determine if two lines are parallel using angle measurements?

Back

If corresponding angles are equal or if alternate interior angles are equal, the lines are parallel.

Front

If angle A = 35 degrees and angle B is a corresponding angle, what is the measure of angle B?

Back

Angle B = 35 degrees (because corresponding angles are equal).

Front

If two lines are cut by a transversal and the alternate interior angles are equal, what can be concluded?

Back

The two lines are parallel.

Front

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

Back

The corresponding angles are equal, alternate interior angles are equal, and consecutive interior angles are supplementary.