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Adjacent, Vertical, Supplementary, Complementary and Alternate, Angles.

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Presentation on theme: "Adjacent, Vertical, Supplementary, Complementary and Alternate, Angles."— Presentation transcript:

1 Adjacent, Vertical, Supplementary, Complementary and Alternate, Angles

2 Adjacent angles are “side by side” and share a common ray. 45º 15º

3 These are examples of adjacent angles. 55º 35º 50º130º 80º 45º 85º 20º

4 These angles are NOT adjacent. 45º55º 50º 100º 35º

5 When 2 lines intersect, they make vertical angles. 75º 105º

6 Vertical angles are opposite one another. 75º 105º

7 Vertical angles are opposite one another. 75º 105º

8 Vertical angles are congruent (equal). 30º150º 30º

9 Supplementary angles add up to 180º. 60º120º 40º 140º Adjacent and Supplementary Angles Supplementary Angles but not Adjacent

10 Complementary angles add up to 90º. 60º 30º 40º 50º Adjacent and Complementary Angles Complementary Angles but not Adjacent

11 Alternate Interior Angles 1.For any pair of parallel lines 1 and 2, that are both intersected by a third line, such as line 3 in the diagram below, angle A and angle D are called alternate interior angles. Alternate interior angles have the same degree measurement. Angle B and angle C are also alternate interior angles.

12 Alternate Exterior Angles For any pair of parallel lines 1 and 2, that are both intersected by a third line, such as line 3 in the diagram below, angle A and angle D are called alternate exterior angles. Alternate exterior angles have the same degree measurement. Angle B and angle C are also alternate exterior angles.

13 Practice Time!

14 Directions: Identify each pair of angles as vertical, supplementary, complementary, or none of the above.

15 #1 60º 120º

16 #1 60º 120º Supplementary Angles

17 #2 60º 30º

18 #2 60º 30º Complementary Angles

19 #3 75º

20 #3 75º Vertical Angles

21 #4 60º 40º

22 #4 60º 40º None of the above

23 #5 60º

24 #5 60º Vertical Angles

25 #6 45º135º

26 #6 45º135º Supplementary Angles

27 #7 65º 25º

28 #7 65º 25º Complementary Angles

29 #8 50º 90º

30 #8 50º 90º None of the above

31 Directions: Determine the missing angle.

32 #1 45º?º?º

33 #1 45º135º

34 #2 65º ?º?º

35 #2 65º 25º

36 #3 35º ?º?º

37 #3 35º

38 #4 50º ?º?º

39 #4 50º 130º

40 #5 140º ?º?º

41 #5 140º

42 #6 40º ?º?º

43 #6 40º 50º


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