There are 7 classifications of triangles.
Based on the sides we have:
Scalene (All Different)
![Image result for scalene triangles](https://i.ytimg.com/vi/Pv854t5QUVs/maxresdefault.jpg)
![Image result for scalene triangles](https://i.ytimg.com/vi/Pv854t5QUVs/maxresdefault.jpg)
Equilateral (All Equal)
Isosceles (2 Similar, 1 Different)
Based on the angles we have:
Acute (1-89 Degrees)
![Image result for acute triangles](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Triangle.Acute.svg/1200px-Triangle.Acute.svg.png)
Right (90 Degrees)
Obtuse (91-179 Degrees)