1. 5 Minute Check Solve. Complete in your notebook. 1. If two angles are complementary and one of them is 77°, what is the size of the other angle? 2. If two angles are complementary and one of them is 34°, what is the size of the other angle? 3. Two angles are complementary and one of them is four times as big as the other. What is the size of the larger of the two angles? 4. There are six angles around a point. One of them is 45˚ and the other five are all the same. What is the size of one of the five angles?

2. 5 Minute Check Solve. Complete in your notebook. 1. If two angles are complementary and one of them is 77°, what is the size of the other angle?

3. 5 Minute Check Solve. Complete in your notebook. 1. If two angles are complementary and one of them is 77°, what is the size of the other angle? 13°

4. 5 Minute Check Solve. Complete in your notebook. 2. If two angles are complementary and one of them is 34°, what is the size of the other angle?

5. 5 Minute Check Solve. Complete in your notebook. 2. If two angles are complementary and one of them is 34°, what is the size of the other angle? 56°

6. 5 Minute Check Solve. Complete in your notebook. 3. Two angles are complementary and one of them is four times as big as the other. What is the size of the larger of the two angles?

7. 5 Minute Check Solve. Complete in your notebook.. 3. Two angles are complementary and one of them is four times as big as the other. What is the size of the larger of the two angles? x+ 4x = 90 5x = 90Since the larger angle is 4x the smaller, then the larger angle is 5x = 904 · 18 = 72˚ 5 5 x = 18

8. 5 Minute Check Solve. Complete in your notebook. 4. There are six angles around a point. One of them is 45˚ and the other five are all the same. What is the size of one of the five angles?

9. 5 Minute Check Solve. Complete in your notebook. 4. There are six angles around a point. One of them is 45˚ and the other five are all the same. What is the size of one of the five angles? 45 + 5x = 360 -45 5x = 315 5 5 x = 63˚

10. Friday, Feb 28 Chapter13-2 Measuring Angles

11. Angles Objective: To draw and label angles.

12. Angles An angle of 80 ° is what type of angle?

13. Angles An angle of 80 ° is what type of angle? Since 80 ° is between 0 ° and 90 °, it is an acute angle.

14. Angles An angle of 90 ° is what type of angle?

15. Angles An angle of 90 ° is what type of angle? 90 ° is a right angle.

16. Angles An angle of 165 ° is what type of angle?

17. Angles An angle of 165 ° is what type of angle? Since 165 ° is between 90 ° and 180 °, it is an obtuse angle.

18. Angles Is this angle right, straight, obtuse or acute?

19. Angles Is this angle right, straight, obtuse or acute? Since the angle is 180°, it is straight.

20. Angles Is this angle right, straight, obtuse or acute?

21. Angles Is this angle right, straight, obtuse or acute? Since the angle has the “right angle symbol”, it must be a right angle.

22. Angles Is this angle right, straight, obtuse or acute?

23. Angles Is this angle right, straight, obtuse or acute? Since the angle is less than 90°, it is acute.

24. Angles Two angles are complementary if the sum of their angles is 90 °. Two angles are supplementary if the sum of their angles is 180 °.

25. Angles Angles A and B are complementary. If m A = 45 °, what is m B?

26. Angles Angles A and B are complementary. If m A = 45 °, what is m B? 90° - 45° = m B 35 ° = m B

27. Angles Angles M and N are supplementary. If m M = 95 °, what is the measure of N?

28. Angles Angles M and N are supplementary. If m M = 95 °, what is the measure of N? M + N = 180 ° 95 ° + N = 180 ° N = 85 °

29. Angles Angles C and D are complementary. If m C = 27 °, what is the measure of D?

30. Angles Angles C and D are complementary. If m C = 27 °, what is the measure of D? C + D = 90 ° 27 ° + D = 90 ° D = 63 °

31. Angles Angles A and B are supplementary. If m A = 147 °, what is the measure of B?

32. Angles Angles A and B are supplementary. If m A = 147 °, what is the measure of B? A + B = 180 ° 147 ° + B = 180 ° B = 33 °

33. Angles Is the angle obtuse, right, acute or straight?

34. Angles Acute. Estimate the angle.

35. Angles Acute. Estimate the angle. About 45 °

36. Angles Is the angle obtuse, right, acute or straight?

37. Angles Obtuse. Estimate the angle.

38. Angles Obtuse. Estimate the angle. About 135 °

39. Angles Is the angle obtuse, right, acute or straight?

40. Angles Straight. Estimate the angle.

41. Angles Straight. Estimate the angle. Straight angles are always 180 °.

42. Angles If two angles are the same they are called congruent.

43. Angles The symbol for congruent is. e.g. The measure of angle ABC is the same as the measure of angle PQR.

44. Angles In a drawing, congruent angles are shown in the same manner as congruent sides on the polygon. e.g.

45. Angles Review- What integer describes a loss of 9 yards?

46. Angles Review- What integer describes a loss of 9 yards? -9

47. Angles Review- +6+(+8) =

48. Angles Review- +6+(+8) = 14

49. Angles Review- -15 ÷ (-3) =

50. Angles Review- -15 ÷ (-3) = 5

51. Angles Review- -34 ÷ (17) =

52. Angles Review- -34 ÷ (17) = -2

53. Angles Review- -48 ÷ (-12) =

54. Angles Review- -48 ÷ (-12) = 4

55. Angles Review- 6(34.4 + 5.3) =

56. Angles Review- 6(34.4 + 5.3) = 238.2

57. Angles Review- 4(14.1 + 16.8) =

58. Angles Review- 4(14.1 + 16.8) =123.6

59. Angles Review- 8(14 ÷ 7) =

60. Angles Review- 8(14 ÷ 7) = 16

61. Angles Review- 3(121 ÷ 11) =

62. Angles Review- 3(121 ÷ 11) = 33

63. Angles Review- 3(8 ² ) =

64. Angles Review- 3(8 ² ) = 192

65. Angles Why was the obtuse angle upset?

66. Angles Why was the obtuse angle upset? Because he was never right.

67. Angles Agenda Notes – No Homework – Practice Skills 13-2 Due at the end of the period Mid-Chapter 13 Quiz Monday, March 3