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Get Materials!

Get Materials!. Get Materials!. 01. 57. 56. 55. 54. 53. 52. 51. 50. 49. 48. 47. 46. 45. 43. 42. 41. 40. 39. 38. 37. 36. 35. 34. 33. 32. 44. 30. 31. 29. 59. 14. 58. 27. 26. 25. 24. 23. 22. 21. 20. 19. 18. 17. 16. 28. 15. 13. 12. 11. 10. 09. 08.

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Get Materials!

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  1. Get Materials!

  2. Get Materials! 01 57 56 55 54 53 52 51 50 49 48 47 46 45 43 42 41 40 39 38 37 36 35 34 33 32 44 30 31 29 59 14 58 27 26 25 24 23 22 21 20 19 18 17 16 28 15 13 12 11 10 09 08 07 06 05 04 03 02 00 01

  3. Get Materials! 00 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

  4. Homework Answers…Questions? 5. M’(-1, -3) A’(0, -1) T’(1, -1) H’(2,-3) 6. A’(2,0) B’(-1, 0) C’(-1, 2 7. X’(-1, -5) Y’ (4,-1) Z’ (6, -6) (x,y)  (x+2, y-5) (x,y)  (x+5, y+5) (x,y)  (x-6, y-4) 6 blocks East and 4 blocks North

  5. Today’s Agenda: Section 1.2.3 What are we learning today? Rotating objects clockwise and counter-clockwise a specific number of degrees Why does it matter? Building any object that has a part that turns, flips, or slides in a set direction

  6. Transformations Scale

  7. Rotating with see-through paper • Trace original figure and point of rotation • Put pencil on point of rotation and turn • If rotating 90o, 180o, or 270o put a + over the point of rotation see 90o turns • If it doesn’t specify, rotate counter-clockwise

  8. Special Rotations about theorigin • Rotating 180o about the origin (0,0): same numbers with opposite signs • Example: R(-2, -4)  R’(2, 4) • Rotating 90o about the origin: • Numbers flip • Moves 1 quadrant – use signs for new quadrant • Example: rotate T(-5, 3) 90o clockwise • Moves from Q2 to Q1 (+, +) • T’ (3, 5)

  9. Rotations in regular polygons • A Regular polygon has equal side lengths and equal angle measures • When a regular polygon has been “pizza sliced”, all the central angles are equal • Central angle = 3600 / # of sides • If you rotate the regular polygon by a multiple of the central angle the polygon maps onto itself

  10. Example How many degrees would you have to rotate the pentagon, about X, to map V onto S?

  11. Your classwork tasks • As a class: practice worksheet #1, 3, 5, 9, 15, and 18 • In your pairs: finish the worksheet (don’t use tracing paper) • On your own: textbook pg 37 #69, 70ab, and 71 (use tracing paper)

  12. Homework Workbook pg 227 #6-13, 18

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