Week 7
Warm Up
09.30.11
1) What portion of the conditional statement is underlined in
blue? Which portion is underlined in red?
If I drink water, then I stay hydrated.
Geometry
2.5 Day 2
Theorem 2.1
I will justify statements about congruent
segments.
Properties of Segment Congruence
Reflexive
AB ≅ AB
Symmetric
IF AB ≅ CD, then CD ≅ AB
Transitive
IF AB ≅ CD, and CD ≅ EF, then AB ≅ EF
Ex 1
K
Given: LK = 5
Given: JK = 5
Given: JK ≅ JL
J
L
Prove: LK ≅ JL
Step
Reason
LK = 5
Given
JK = 5
Given
LK = JK
LK ≅ JK
JK ≅ JL
LK ≅ JL
Transitive Property
of equality
Definition of Congruent
Segments
Given
Transitive Property
of equality
Ex 2
Given: LE = MR
Given: EG = RA
Prove: LG = MA
Step
LE = MR and EG = RA
E
L
A
G
M
R
Reason
Given
LE + EG = LG
P2
MR + RA = MA
P2
Ex 2
Given: LE = MR
Given: EG = RA
Like # 12
on quiz
Prove: LG = MA
Step
LE = MR and EG = RA
E
L
A
M
R
Reason
Given
LE + EG = LG
P2
MR + RA = MA
P2
LE + EG = MA
Substitution
Property of Equality
LG = MA
G
Substitution
Property of Equality
Turn in Assignment: Handout 2.5 B
Quiz Week 7: Handout
(SHOW STEPS if needed! )
You may use your notebook for the quiz.
Turn in Notebook
No Talking During the Quiz
No Homework today!