This video reviews the definitions and theorems that you'll need to know in order to do problems and proofs about parallels and transversals: alternating interior angles, alternating exterior angles, and corresponding angles.

Parallel Lines & Transversals Problems

This video covers all those types of non-proof problem where they give you a couple or three parallel lines, with one or two transversals crossing them, and then you're supposed to solve for all the angles and x's all over the problem. They never end!

Parallel Line & Transversal Proofs

This video shows you how to use vertical angles and alternating interior angles to prove alternating exterior angles are congruent, among other things. Aren't you glad that Geometry exists to make you prove stuff that you never cared about in the first place?

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If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)