Reflections

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Reflections
GEOMETRY LESSON 12-1
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Reflections
GEOMETRY LESSON 12-1
Solutions
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12.1 Reflections
Vocabulary Transformation A change of a
geometric figure in its position, shape, or size.
The resulting figure is called an image. The
original figure is called the preimage. Isometry
A transformation that results in a congruent
image.
? ABC ? ? A B C
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Reflections
GEOMETRY LESSON 12-1
Does the transformation appear to be an
isometry? Explain.
The image appears to be the same as the preimage,
but turned.
Because the figures appear to be congruent, the
transformation appears to be an isometry.
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Reflections
GEOMETRY LESSON 12-1
In the diagram, XYZ is an image of ABC.
b. List all pairs of corresponding sides.
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A reflection is an isometry transformation that
results in a mirror image
A
A
B
B
D
C
C
D
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Reflections
GEOMETRY LESSON 12-1
XYZ has vertices X(0, 3), Y(2, 0), and Z(4,
2). Draw XYZ and its reflection image in the
line x 4.
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Reflections
GEOMETRY LESSON 12-1
Show that PD and PW form congruent angles with
line .
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Reflections
1. Is the transformation below an isometry?
Explain.
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Reflections
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Reflections
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Reflections
1. Is the transformation below an isometry?
Explain.
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