Author: Academic Computing Services

Classification of a triangle by sides.
Equilateral Triangle– A triangle that has three equal sides and three equal angles.
Isosceles Triangle– A Triangle that has two congruent sides.
Scalene– A triangle that has all sides of different lengths.
Classification of triangles by angles.
Right Triangle– A triangle that has one right angle (90°).
Obtuse Triangle– A triangle that has one obtuse angle (more then 90°).
Acute Triangle– A triangle that has all angles smaller then 90°.

Using the picture below, find and identify as many different triangles as you can. Do you notice any patterns?

Pentagon

Circle

Square

Rectangle

Hexagon

Triangle

Created by:
Kaitlin Guiles
and
Adam Dennison