Triangles

Equilateral Triangle  Scalene Triangle      Obtuse Triangle

Three equal sides                    No equal sides               Has an angle more than 90°

Three equal angles,                  No equal angles

 always 60°

Isosceles Triangle               Right Triangle             Right Isosceles Triangle

 Two equal sides                      Has a right angle (90°)  Has a right angle (90°), and

 Two equal angles                                                                  also two equal angles

Acute Triangle

All angles are less than 90°