## Section 7.3: Triangles

## 7.3 Outline

- Terminology
- six parts of a triangle
- classifying triangles
- by sides
- scalene
- isosceles
- equilateral

- by angles
- acute
- right
- obtuse

- by sides
- congruent triangles
- construction
- corresponding parts

- Angles of a triangle
- angles in a triangle
- exterior angle
- exterior angle property

- Isosceles triangle