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.
One neat use of geometry skills is construction. Using simply a ruler and compass, you can create some important figures. Check out this video for one example.
With the minimum of three sides, triangles are the most basic and important polygons. Learn the basics and build a strong foundation through classifying triangles. This skill will help you throughout this and future math classes. This video serves as a great review.
Try to follow the steps that are provided in the slide to solve the problem. Then play this video to see if you got the correct answer. If so, great job!
Try the problem that follows the initial instruction of triangle exterior angles. This skill will help us solve many interesting problems in the upcoming section.
This exciting teacher is at it again! Here is Mr. Kennedy's video on some 3-dimensional geometry concepts. He added some cool animation. Wow, this guy is awesome.
Aside from parallel lines, this chapter also deals with relationships involving perpendicular lines. This is the link to a video explaining some fo the key concepts.