Parallel Lines Cut by Tranversal
An interactive look at transversals and angles. NOTE: Corresponding angles are color coded.
If we know that alternate interior angles are congruent, can we say that two lines are parallel? Manipulate the lines to find out. Click and drag any of the points A, B, C, or D until you are confident that your lines are parallel. You can check your work by clicking the "Force Parallel?" button.