GEOMETRY SLIDESHOW 2:

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GEOMETRY SLIDESHOW 2
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CONGRUENTFigures are the same SIZE and SHAPE
Congruent
NOT Congruent
NOT Congruent
not same size
not same shape
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Which figures are congruent?
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Did you get the following pairs? A and G D and I
E and J C and H Remember Shapes can be
congruent even if one of them has been rotated
(as in A and G) or reflected (as in C and H).
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SIMILAR Figures have the same shape, but not
size.
Similar
Similar
Similar
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SIMILAR Figures have the same shape, but not
size.
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MOTIONSThere are 3 different ways to move a
plane figure
SLIDEFLIPTURN
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SLIDE TranslationFLIP ReflectionTURN
- Rotation
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SLIDE TRANSLATION

• Moves a figure in a straight direction

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FLIP REFLECTION

• gives a mirror image of a figure

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TURN ROTATION

• moves a figure about a point

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A slide or translation
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A slide or translation
moves a figure in a straight direction
L
L
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A flip or reflection
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A flip or reflection
gives a figure its mirror image
L
L
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A turn or rotation
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A turn or rotation
moves a figure about a point
L
L
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SYMMETRYA rectangle is a symmetric figure
because it can be folded into 2 congruent halves
that fit on top of each other. Each of your
folds lie along a line of symmetry. The
rectangle has two lines of symmetry.
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SYMMETRYThis W has only one line of symmetry.
W