We went over the trapezoid calculations homework together in class as well as two different types of proof problems in preparation for the test tomorrow. The students then had time to begin working on their review sheet in class.
Assignment: Chapter 5 Review Sheet
Answers to review sheet:
1. triangle YWX
2. angle XYZ
3. 110
4. a. 30 b. 64
5. a. 12 b. 6
6. 4
7. rectangle
8. rhombus
9. parallelogram
10. rectangle
11. rhombus
12. square
13. sometimes
14. sometimes
15. never
16. sometimes
17. median or midsegment
18. a. 115 b. 65
19. 7
20. a. 8 b. 2 c. 36
21. proof parts 1. given 2. opp. sides of parallelogram are congruent 3. def. of parallelogram
(can also be opp. sides of parallelogram are parallel) 4. angle SRT congruent to angle UTW
5. given 6. same as reason number 4 7. AAS 8. CPCTC
22. Statements Reasons
1. BE is congruent to BC 1. given
angle 1 congruent to angle 3; angle 2 congruent to angle 4
2. angle 1 is congruent to angle 2 2. base angles of isos. triangles are
congruent
3. angle 3 congruent to angle 2; angle 4 congruent to angle 1 3. substitution / transitive
4. AD is parallel to BC 4. if corr. angles are congruent, then
lines are parallel
5. AB is parallel to DC 5. if alt. interior angles are congruent,
then lines are parallel
6. ABCD is a parallelogram 6. if both pairs of opp. sides are
parallel, then quad. is a
parallelogram
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