Using HL

When you have a right triangle, consider the Hypotenuse-Leg Theorem.  This video link gives a good example for the last postulate/theorem that we use to prove triangles congruent.  The example shows another way to do proofs - by using flow-chart style proofs.

But, if you prefer the traditional two-colume proof, this video is for you!

Isosceles Triangles

This is a good review of what we learned just prior to the break.  Watch this video to review some of the key concepts in isosceles triangles.  The example that follows is also a challenging practice.

Parallel Lines Review

This is a slide from our class notes on a lesson in parallel lines.  Make sure you know where the answers are coming from.  Review key terms: linear pair, vertical angles, corresponding angles, same-side interior/exterior angles, and alternate interior/exterior angles.