Welcome to December! We went over our homework together before taking a look at a few examples of parallelogram proofs in preparation for the quiz tomorrow. We also went through 2-3 examples of how to solve for 2 variables at once by using the elimination of a variable in a system of equations. The students then got started on their review sheet.
Assignment: Chapter 5 Quiz review sheet; only do the odd numbered problems.
Answers to review sheet;
page 1.
1. x = 8; y = 10; z = 10
3. x = 20
5. x = 31
7. x = 60; y = 140
9. x = 50
Page 2
1. true
3. true
5. x = 20; y = 10
7. 15
9. 6
11. 84
13. 72
15. 16
17. 2
Page 3
1. yes, both diagonals bisect
2. no, only one pair of sides are parallel
3. no, one pair of sides is not parallel
4. yes; one pair of sides is both congruent and parallel
5. yes; both pairs of opposite angles are congruent
6. no; only one pair of sides congruent
7. no; only one pair of sides congruent
8. yes; both pairs of opposite sides are parallel
9. x = 20; y = 12
11. x = 1
13. x = 20
15. x = 6
17. x = 3
19. x = 8
Page 4
21. choice E
23. choice A
25. choice B or choice C
27. plot points on graph
29. choice C
31. choice B or choice E
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