1. Special Right Triangles

2. Take a square…

3. Find its diagonal Here it is

4. Find its length x d x

5. x d x

6. Summarize the pattern:

7. 45 o -45 o -90 o leg leg leg

8. 6 6 6

9. Practice:

10. 8 8 8

11. 5 5 5

12. 10 10 10

13. 2

17. Now Let’s take an Equilateral Triangle…

18. … Find its Altitude

19. x x x a

20. x x a

21. Summarize the pattern:

22. 30 o -60 o -90 o Hypotenuse Longer leg Shorter Leg

23. 30 o -60 o -90 o Hyp. ½ Hyp.

24. 30 o -60 o -90 o

25. Practice:

35. Review Both Patterns:

36. 45 o -45 o -90 o leg leg leg

37. 30 o -60 o -90 o Hyp. ½ Hyp.

38. Mixed Practice:

41. 8 8 8

42. 10 10 10

52. 4 4

53. 2