2. 6.1 & 6.26.36.46.56.6 10 20 30 40 50

3. + Question 6.1 & 6.2 – 10

4. + Answer 6.1 & 6.2 – 10 The figure is a concave polygon. It has more than three sides. Each side is intersected by another side at either endpoint and each side in a segment (not curved).

5. + Question 6.1 & 6.2 - 20

6. + Answer 6.1 & 6.2 – 20 The figure is not a polygon because two sides are not intersected at both sides by another side.

7. + Question 6.1 & 6.2 - 30

8. + Answer 6.1 & 6.2 – 30 The m D is 120 o. The sum of the measures of the interior angles of quadrilateral is 360 o.

9. + Question 6.1 & 6.2- 40

10. + Answer 6.1 & 6.2 – 40 A. Pentagon (5 sides)

11. + Question 6.1 & 6.2 - 50

12. + Answer 6.1 & 6.2 – 50 J. 45 o. The sum of the measures of the interior angles of quadrilateral is 360 o.

13. + Question 6.3 - 10

14. + Answer 6.3 – 10 C. Bisect each other

15. + Question 6.3 - 20

16. + Answer 6.3 – 20 y = 7 x = 61

17. + Question 6.3 – 30

18. + Answer 6.3 – 30 y = 110 x = 100

19. + Question 6.3 - 40

20. + Answer 6.3 – 40 The quadrilateral is a parallelogram because the diagonals bisect each other.

21. + Question 6.3 - 50

22. + Answer 6.3 – 50 The quadrilateral is not a parallelogram because the opposite angles are not congruent.

23. + Question 6.4 - 10

24. + Answer 6.4 – 10 That all four angles are right angles.

25. + Question 6.4 - 20

26. + Answer 6.4 – 20 b = 4 a = 11

27. + Question 6.4 - 30

28. + Answer 6.4 – 30 F. 3

29. + Question 6.4 - 40

30. + Answer 6.4 – 40 J. trapezoid

31. + Question 6.4 - 50

32. + Answer 6.4 – 50 Square: all sides are congruent and all angles are right angles.

33. + Question 6.5 - 10

34. + Answer 6.5 – 10 D. x = 95, y = 85

35. + Question 6.5 - 20

36. + Answer 6.5 – 20 D. 11

37. + Question 6.5 - 30

38. + Answer 6.5 – 30 = 65 o = 122 o

39. + Question 6.5 - 40

40. + Answer 6.5 – 40 14

41. + Question 6.5 - 50 n y

42. + Answer 6.5 – 50 MN = 24

43. + Question 6.6 - 10

44. + Answer 6.6 – 10 parallelogram

45. + Question 6.6 - 20

46. + Answer 6.6 – 20 square

47. + Question 6.6 - 30

48. + Answer 6.6 – 30

49. + Question 6.6 - 40

50. + Answer 6.6 – 40

51. + Question 6.6 - 50

52. + Answer 6.6 – 50 Yes, because opposite sides are congruent and one angle is given as right, the other angles must also be right.