4.1 Congruent Figures
November 18, 2009
4.1 Congruent Figures
Objective: Recognize congruent figures and their corresponding parts.
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4.1 Congruent Figures
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What is the difference between congruent and similar triangles?
• Write a definition for each in your own words.
• Draw and example of each.
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4.1 Congruent Figures
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Congruent figures have exactly the same size and shape.
When two figures are congruent you can move one so that it fits exactly on the other one.
Congruent polygons have congruent corresponding parts.
To name congruent polygons list them in order of their congruent parts. ABCD ≅ YZWX
A
D
X
W
B
Z
C
Y
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Naming Congruent Parts
ABCD ≅ YZWX
List the congruent corresponding parts.
Sides:
Angles:
A
D
B
X
W
C
Z
Y
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Statements
Reasons
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Homework
page: 200
#'s: 3 ­ 13, 24 ­ 28, 38 ­ 40
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