Challenge!

1. Challenge! • Ka-Broom! Rules: Each member of your team must catch 2! First team to complete the task gets 5 points, 2nd team gets 3, 3rd team gets 2!

2. Unit 4 TRIANGLE FUN 

3. I can use the angle sum theorem • I can use the angle sum theorem • I can the exterior angle theorem • I can the exterior angle theorem Learning Targets Lesson 4-1

4. sum angles 180°

5. 30° m∠1 = 28° m∠1 = 120°

6. 58° 32° 32° 58° m∠1 = 56° m∠2 = 56° m∠3 = 74°

7. remote interior exterior not

8. exterior angle sum remote interior angles m∠1 = m∠A + m∠B

9. m∠1 = 115°

10. 2x + 95 = 145 2x = 50 x = 25

11. 140° 65° 40° 75° 115°

12. 55° 55° 70°

13. 125° 55° 95°

14. ASSIGNMENT: 4-1Worksheet

15. 4.2 Congruent Triangles Learning Target: • I can name and label corresponding parts of congruent triangles.

16. vertices A B C

17. size shape

18. Angle Measure Betweenness Collinearity Distance

19. m∠A = m∠J JK AB = m∠B = m∠K BC = KL m∠L JL m∠C = AC = Match up the letters in the same “position” AND look at the ‘tick marks’ in the picture! Match the congruent pieces!

22. Warm Up

25. I can recognize and use the SSS, SAS, ASA, AAS, and HL Postulates to see if triangles are the same. Lesson 4.3

27. CAN’T USE!!! 40 40 50 50

28. CAN’T USE!!! 7 7 6 6 40° 40°

30. SAS ∆DNV ≅ ∆BCX

31. SSS ∆TRS ≅ ∆SUT

32. HL ∆JKL ≅ ∆MNP

33. AAS ∆NJK ≅ ∆LMK

34. Your turn! Try e-h! SAS ∆CDA ≅ ∆BDA

35. ASA ∆RST ≅ ∆UVT

36. AAS ∆RUT ≅ ∆RST

37. SAS ∆FJH ≅ ∆GHJ

38. A M R C W G MG ≅ AC

39. D X G K Y Z YZ ≅ DK

40. D A E F B C ∠B ≅ ∠E or ∠C ≅ ∠F

41. ASSIGNMENT: “Swimming through triangles” worksheet, both sides (Pages 3 – 4)

42. Warm Up

44. PROOFS! Lesson 4.4

45. TS ≅ TS Given Given Reflexive ∆RST ≅ ∆UTS SSS

46. US ≅ US Given Given Def’n of angle bisector ∠RSU ≅ ∠TSU Reflexive SAS ∆RSU ≅ ∆TSU

47. Your Turn…

48. BD ≅ BD Given Given Reflexive SSS ∆ABD ≅ ∆CBD CPCTC ∠A ≅ ∠C

49. DF ≅ DF DG ≅ FE Given Given Reflexive AIA ≅↔ || lines ∠EDF ≅ ∠GFD AAS ∆EDF ≅ ∆GFD CPCTC

50. BC ≅ BC Given Given Reflexive HL ∆BAC ≅ ∆BDC CPCTC ∠A ≅ ∠D