Proving Lines Parallel

Front

What is the value of x that indicates lines l and m are parallel?

Back

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Front

What is the Converse of Corresponding Angles Postulate?

Back

If two lines are cut by a transversal and the corresponding angles are congruent, then the lines are parallel.

Front

Are corresponding angles congruent when two lines are parallel?

Back

Yes, corresponding angles are congruent.

Front

Can vertical angles alone prove that two lines are parallel?

Back

No, vertical angles are not enough to prove lines parallel.

Front

What is the Converse of Consecutive Interior Angles Theorem?

Back

If two lines are cut by a transversal and the consecutive interior angles are supplementary, then the lines are parallel.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines in relation to a transversal.

Front

What is the definition of parallel lines?

Back

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

Front

What is the Consecutive Interior Angles Theorem?

Back

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

Front

What does it mean for angles to be supplementary?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What is the relationship between alternate interior angles and parallel lines?

Back

If two lines are cut by a transversal and the alternate interior angles are congruent, then the lines are parallel.