Download Congruence

Name
Chapter 19, Lesson 4
Reteach
Date
Congruence
CA Standards
MG 2.1, MG 2.0
Identify congruent figures using two methods.
Janie is making a scrapbook using pictures of
her camping trip. She wants the figures in her
album to be the same size and same shape.
Are triangles GHJ and LMN congruent?
M
H
J
G
N
L
Use a Tracing
Use a Ruler and Protractor
Step 1
Step 1 Use a ruler to measure the sides of
triangle GHJ and triangle LMN.
Trace triangle GHJ.
Step 2 Place your tracing on top of
triangle LMN.
The figures are the same size and shape, so
they are congruent: GHJ LMN
Step 2 Use a protractor to measure the
angles of triangle GHJ and triangle LMN.
The sides and angles of both triangles
have the same measure, so the figures are
congruent: GHJ LMN .
Determine if the two figures are congruent. Write yes or no.
1.
Figure 2
2. Figure 1
Figure 2
Figure 1
3.
4.
Writing Math Use one of the methods on this page to
determine whether the figures at the right are congruent.
Explain why you chose your method.
Reteach
A
B
Use with text pages 420–421.
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