# 6 Triangles

### Meredith

## Definitions.

Definitions-

Obtuse- A triangle that has an angle greater than 90°

Acute-A triangle that has all angles less than 90° (90° is called a Right Angle)

Equilateral-A triangle with all three sides of equal length.

Right- A triangle that has a right angle (90°)

Isosceles-A triangle with two equal sides The angles opposite the equal sides are also equal.

Scalene-A triangle with all sides of different lengths. No sides are equal and no angles are equal.