1. Geom3­1hour4.notebook October 03, 2011
BELL WORK:
Write a 2­column proof for the following.
Given: Diagram as shown.
1 = 2. 1 2 3 4
Prove: 2 = 3.
Agenda for Today:
• section 3.1
• exit slip
• return Ch. 2 tests and other homework
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2. Geom3­1hour4.notebook October 03, 2011
3.1 ­ What are congruent figures?
After this lesson, you should be able to:
1. Define congruent figures.
2. Accurately identify corresponding parts of figures.
Read on p.111 ­ Introduction
Congruent triangles all pairs of corresponding parts are congruent.
A D How do we write that these
triangles are congruent?
B C E F
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3. Geom3­1hour4.notebook October 03, 2011
Congruent polygons all pairs of corresponding parts are congruent.
N
T Z
W
R U L
P
Y E
C
F
Check out the paragraph under the
definition of congruent polygons on p. 112!
Look at you guys being ahead of the game!
Congruent triangles??
D
U
R T
Y
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4. Geom3­1hour4.notebook October 03, 2011
A new use for the REFLEXIVE PROPERTY!
H
X S Q
Reflexive Property: Any segment or angle is congruent to itself.
p.113 Sample Problem 1
D M C
2 1
4 3
A N B
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5. Geom3­1hour4.notebook October 03, 2011
p.114 Sample Problem 2 E
Q R
P
5 7
6 8
F G
EXIT SLIP
ERC = ?
E C
R T
HOMEWORK: p.114 #2,3,4
Due Wednesday
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6. Geom3­1hour4.notebook October 03, 2011
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