Click on the links below to learn about triangles:

Lesson

Link #1-PHSchool-Classifying Triangles by Angles (video)

Link #2-PHSchool-Classifying Triangles by Sides (video)

Link #3-PHSchool-Angle Sums of Triangles (video)

Other

Link #1-Teacher Tube (podcast)-triangle fundamentals

Virtual Geoboard