1. Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010

2. Classifying triangles by angles  Acute triangle – all of the angles are acute

3. Classifying triangles by angles  Obtuse triangle – one angles is obtuse

4. Classifying triangles by angles  Right triangle – one angles is 90°

5. Classify the triangle by it’s angles 85° 55°40°

6. Right Acute Triangle

7. Classify the triangle by it’s angles 60° 30°

8. Right Right triangle

9. Classifying the triangle by it’s angles 110°

10. Right Obtuse Triangle

11. Classify triangles by sides  Scalene triangle – no sides are congruent

12. Classify triangles by sides  Isosceles triangle – at least 2 sides are congruent.

13. Classify triangles by sides  Equilateral triangles – all sides of a triangle are congruent

14. Classify triangles by sides

15. Right Isosceles triangle

16. Classify triangles by sides

17. Right Scalene Triangle

18. Classify the triangle using the sides

19. Right Equilateral Triangle

20. Classify the triangle using the sides

21. Right Isosceles Triangle