Lesson Page

Math A

Types of Triangles

 

Triangles can be classified in two ways.

 

BY THEIR SIDES
Scalene - no congruent sides.

             

Isosceles - two congruent sides.
(DF = FE)

Equilateral - three congruent
                sides.

 

BY THEIR ANGLES

 

 Acute - all angles measure less
          than 90º.

 

Right - one angle measures
          exactly 90º.

 

Obtuse - one angle measures
            more than 90º.

 

Equiangular - all angles measure
                the same. (60º)
                This is the same
                as the equilateral
                triangle.

 

 


   Murray