We practiced a couple more triangle proofs involving vocabulary words. We also went over a couple of examples of "before and after" problems involving triangles. The rest of the period was spent working on the chapter 4 quiz review sheet.
Chapter 4 quiz is tomorrow:
Assignment: Chapter 4 quiz review
Some Ways to Prove Triangles Congruent
1. angle U
2. m of angle D
3. segment SU
4. segment UN
5. triangle NSU
6. triangle EDR
7. triangle FAN
8. angle D; CPCTC
9. segment BA; segment BF
10. SAS
11. ASA
12. none
13. none
14. SSS
15. ASA
16. 1. given 2. vertical angle congruent 3. SAS
Using Congruent Triangles
1. 1. given
2. vertical angles congruent
3. SAS
4. CPCTC
2. 1. given
2. if lines parallel, then corr. angles congruent
3. ASA
4. CPCTC
5. if corr. angles congruent, then lines parallel
3. 1. given
2. def. of midpoint
3. reflexive
4. SSS
5. CPCTC
6. def. of angle bisector
Practice 14
1. segment OP
2. BI
3. angle O
4. m angle G
5. triangle OTP
6. triangle IGB
7. sometimes
8. always
9. never
10. SAS
11. ASA
12. none
13. ASA
14. none
15. SAS
16. statements reasons
M is midpoint of XY given
XM congruent YM def. of midpoint
XZ congruent YZ given
ZM congruent ZM reflexive
triangle XZM cong. tri. YZM SSS
angle XZM cong. to angle YZM CPCTC
ZM bisects angle XZY def. of bisect
Proof on back page
statements reasons
angle XZY cong. angle WZV given
Z is midpoint of YV given
YZ is congruent to VZ def. of midpoint
angle Y and angle V are rt. angles given
angle Y congruent to angle V all right angles congruent
triangle XYZ congruent to tri. WVZ ASA
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