1. Classifying Triangles

2. Two Ways to Classify Triangles  By Their Sides  By Their Angles

3. Classifying Triangles By Their Sides  Scalene  Isosceles  Equilateral

4. Scalene Triangles  No sides are the same length

5. Isosceles Triangles  At least two sides are the same length

6. Equilateral Triangles  all sides are the same length

7. Classifying Triangles By Their Angles  Acute  Right  Obtuse

8. Acute Triangles  Acute triangles have three acute angles

9. Right Triangles  Right triangles have one right angle

10. Obtuse Triangles  Obtuse triangles have one obtuse angle

11. Classify this triangle. Right Scalene

12. Classify this triangle. Obtuse Isosceles

13. Classify this triangle. Acute Scalene

14. Classify this triangle. Acute Isosceles

15. Classify this triangle. Obtuse Scalene

16. Classify this triangle. Right Isosceles

17. Triangle Degrees  The sum of the measures of any triangle is 180°. 70° x What is the measure of x?

18. Triangle Degrees The sum of the measures of any triangle is 180°. 45° x What is the measure of x?

19. Triangle Degrees  The sum of the measures of any triangle is 180°. What is the measure of x? x 60°50°