Triangles can be classified in the following manner:
- By ANGLES
- acute triangle- a triangle with 3 acute angles
- right triangle- a triangle with one right angle
- obtuse triangle- a triangle with one obtuse angle
- equiangular triangle- a triangle with 3 congruent 60 degree angles
- By SIDES
- scalene triangle- a triangle with no congruent sides
- isosceles triangle- a triangle with at least 2 congruent sides
- equilateral triangle- a triangle with 3 congruent sides
- All equilateral triangles are equiangular.
- All equiangular triangles are equilateral.
- A right triangle will have 1 right angle and 2 acute angles.
- An obtuse triangle will have 1 obtuse triangle and 2 acute angles.
Return to the Triangle Classification Menu