This lesson focuses on the properties of triangles, a closed shape that has three sides, three vertices, and and three internal angles. There are different types of triangles such as a right triangle, obtuse, and acute based on the...

The activity allows students to practice identifying different types of angles. An interactive activity and teacher resources are included.

Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.

Explore the different types of triangles and other properties.