Basic Types of Triangles

1. Equilateral triangle

1.1. Three equal sides Three equal angles, always 60°

2. Isosceles triangle

2.1. Two equal sides Two equal angles

3. Acute angle

3.1. All angles are less than 90°

4. Obtuse triangle

4.1. The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°

5. Right triangle

5.1. A right-angled triangle (also called a right triangle) is a triangle with a right angle (90°) in it.

6. Scalene triangle

6.1. The Scalene Triangle has no congruent sides, each side must have a different length