The document provides instructions for finding missing angles in triangles and quadrilaterals. It defines different types of angles and properties of triangles and quadrilaterals, such as the sum of interior angles in a triangle equaling 180 degrees and in a quadrilateral equaling 360 degrees. It then demonstrates using these properties to calculate missing angles when given other angle measures in example problems.

1. Find the missing angle!11/16/09EQ: How do I find the missing angle in a triangle or quadrilateral?

2. Review:Go over assignment

3. Review:Acute angle:An angle less than 90 degrees

4. Review:Right angle:An angle exactly 90 degrees

5. Review:Obtuse angle:An angle greater than 90 degrees

6. Review:Straight angle:An angle exactly 180 degrees

7. Review:Complementary angles:2 angles equal 90 degrees

8. Review:Supplementary angles:2 angles equal 180 degrees

9. Review:Interior angles in a triangle equal:180 degrees

10. Review:Equilateral Triangle:All sides sameAll Angles same

11. Review:Isosceles Triangle:Two sides sameTwo Angles same

12. Review:Scalene Triangle:No sides sameNo Angles same

13. Review:Interior angles in a quadrilateral equal:360 degrees

14. If you are given 2 angles in a triangle, how do you find the third one?

15. <A + <B + <C = 180So 180 - <A - <B = <C

16. Find the missing angle measure:

17. 52 + 48 =100180 – 100 = 80

18. Find the missing angle measure:

19. 60 + 40 =100180 – 100 = 80

20. Find the missing angle measure:

21. 35 + 70 =105180 – 105 = 75

22. One angle on a right triangle is 40o.What is the 3rd <? 50

23. What is the measure of each angle in equilateral triangles?60

24. Do problems 1 & 2 on Find the Missing Angle.

25. If you are given 3 angles in a quadrilateral, how do you find the fourth one?

26. <A + <B + <C + <D = 360So 360 - <A - <B - <C = <D

27. Find the missing angle measure:

28. 80 + 80 + 100 =260360 – 260 = 100

29. Find the missing angle measure:

30. 75 + 95 + 105 =275360 – 275 = 85

31. Find the missing angle measure:

32. 100 + 80 + 130 =310360 – 310 = 50

33. Find the missing angle measure:

34. Complete problems 3 & 4 on Find the Missing Angle.

35. Questions?Complete problem solving cards.

36. 90 + 90 + 45 =225360 – 225 = 135

37. EQ:How do I find the missing angle in a triangle or quadrilateral?