Name:

1
Please circle your answers. No work, no credit.

• Name
• Date
• Per
• 2.5 Warm-Up 10/20/08

Directions Solve each equation. Write a
justification for each step. 1. 9y 17
-19 2. 5x - 3 4(x 2)
2.5
2

• Assignment Log

Grade the Warm-Up1. Pass it to another
student so that he/ she can grade it.2. As the
grader, place C/B with your name on the Warm-Up
paper.3. Have the Distributor approach the front
of the class to gather red pens for the
group.4. After grading, write how many problems
they had missed on the front.
3

• Name
• Date
• Per
• 2.5 Warm-Up 10/20/08

Please write the correct solutions for each
problem missed.
C/B Your name
- 2
2.5
Directions Solve each equation. Write a
justification for each step. 1. 9y 17
-19 2. 5x - 3 4(x 2)
- 17
- 17
Subtraction Property of Equality
9y -36
Division Property of Equality
9
9
y -4
5x - 3 4x 8
Distributive Property of Equality
- 4x
- 4x
Subtraction Property of Equality
x - 3 8
3
3
Addition Property of Equality
x 11
4

• Assignment Log

5

• Assignment Log

CW p. 107 3 - 15 odd p. 108 17 - 27 odd
6
(No Transcript)
7

• Assignment Log

HW p. 107 2 - 14 even p. 108 16 - 28 even
8

• Assignment Log

9
258 304 A 212 257 B 182 211 C 152
181 D 151 and below F
Assessment Procedure 1. Graders, pass back all
documentation to the Owners.2. Owners, please
verify that the grading is accurate. Then,
initial the Sig column. 3. Place each
document in its respective section in your
binder. 4. Please turn to the Notes section of
your binder to begin the next lesson.
10
Lesson 2.6 Geometric Proof
Objective 1. Write two-column proofs. 2. Prove
geometric theorems by using deductive reasoning.
11
Proof
1.
1. Given
2. Definition of linear pair by pic or definition
of supplementary of S1
2.
3.
3. Substitution of S1 in S2
4.
4. Subtraction Prop. of of S3
12
Proof
1. Given
1.
2.
2. Vertical Angles by pic or given
3.
3. Substitution of S1 in S2
4.
4. Substitution of S3 in S4
5.
5. Subtraction prop. of of S5
6.
13

• Given
• Prove

Proof
A
B
C
X
Y
Z
Reasons
Statements
1.Given
1. 2.
2. Definition of Congruent Segments of S1, S2
3. BC XY
Algebra
Geometry
4. AC ZX
3. Segment Addition Postulate by Pic
5. AB BC AC
6. ZY YX ZX
4. Substitution of S4 in S6
7. ZY YX AC
5. Substitution of S5 in S7
8. AB BC ZY YX
6. Substitution of S3 in S8
9. AB XY ZY YX
7. Subtraction Property of S9
10. AB ZY
8. Definition of Congruent Segments of S10
11.
Geometry
Algebra
14

• Assignment Log

CW p. 113 3, 5 p. 114 7, 9 p. 115 11, 13, 21
15
(No Transcript)
16
266 314 A 219 265 B 188 218 C 157
187 D 156 and below F
Assessment Procedure 1. Graders, pass back all
documentation to the Owners.2. Owners, please
verify that the grading is accurate. Then,
initial the Sig column. 3. Place each
document in its respective section in your
binder. 4. Please turn to the Notes section of
your binder to begin the next lesson.