1. Learning Objective Identify triangles using their sides

2. You already know… A triangle has 3 sides.

3. Equilateral triangle ALL sides are equal 7 7 7

4. Isosceles Triangle 2 sides are equal 8 8 6

5. Scalene Triangle NONE of the sides are the same length 8 7 6

6. Examples Examples

7. Non-Examples 

8. Think… What would be the name of this triangle? 10 13 15

9. Think… How do you know this is a scalene triangle? 10 13 15

10. Importance It will be on the district test It can help you build things

11. Step 1 Look at the length of the sides.

12. Step 2 Ask are all sides equal? Yes NO equilateral Keep Looking!!!

13. Step 3 Ask are 2 sides equal? Yes NO isosceles Keep Looking!

14. Step 4 Ask are NO sides equal? Yes scalene

15. Model: 14 20 16 Scalene Triangle

16. Guided Practice 14 14 12 Isosceles

17. Guided Practice 1015 18 Guided Practice 1015 18 Scalene

18. Guided Practice 11 11 11 Equilateral

19. Closure Why is identifying triangles by their sides important? How did we identify triangles?