Learning About Triangles

Summary
This lesson introduces triangles. It is designed to follow a lesson on drawing angles, and assumes that the children are able to use a protractor to measure angles.

Objectives
• The children will be able to explain the difference between right, acute and obtuse triangles.

• The children will be able to measure and draw all three types of triangles.

Suggested Grades
4th Grade
5th Grade
6th Grade

Excerpt
Polygons are closed shapes which have three or more sides. A square is a polygon and so is a triangle. Most polygons are named according to the number of sides or angles they have. Tri means three. So a tricycle has three wheels, and a triangle has three sides and three angles.

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