Triangles and the Pythagorean Relationship
Pythagorean Theorem I
http://www.khanacademy.org/video/the-pythagorean-theorem?playlist=Geometry
Learn and practice using the pythagorean theorum.
Pythagorean Theorem II
http://www.khanacademy.org/video/pythagorean-theorem-ii?playlist=Geometry
A continuation of the previous video. Also includes more exercises for practice.
Special Triangles: 45-45-90
http://www.khanacademy.org/video/45-45-90-triangles?playlist=Geometry
Learn and practice using the pythagorean theorem with this special triangle.
Special Triangles: 30-60-90 I
http://www.khanacademy.org/video/intro-to-30-60-90-triangles?playlist=Geometry
Learn and practice using the pythagorean theorem with another type of special triangle.
Special Triangles: 30-60-90 II
http://www.khanacademy.org/video/30-60-90-triangles-ii?playlist=Geometry
A continuation of the previous video. Also includes more exercises for practice.