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17 Cards in this Set
- Front
- Back
transformation
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a change in position, shape, or size of a figure.
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isometry
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a transformation in which the preimage and image are congruent.
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reflection
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an isometry in which the preimage and its image are congruent.
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translation
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an isometry in which all points of a figure move the same distance in the same direction.
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glide reflection
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a translation followed by a reflection in a line parallel to the translation vector.
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tessellation
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a repeating pattern of figures that completely covers a plane, without gaps or overlaps.
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dilation
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a transformation that proportionally reduces or enlarges a figure.
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symmetry
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an isometry that maps the figure onto itself.
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reflectional symmetry/
line symmetry |
in a plane figure, one half of the figure is a mirror image to its other half.
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rotational symmetry
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its own image for some rotation of 180 degrees or less
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point symmetry
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has 180 degree rotational symmetry.
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translational symmetry
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the type of symmetry for which there is a translation that maps a figure into itself.
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glide reflectional symmetry
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if a tessellation can be mapped onto itself by a glide reflection.
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dilation
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a similarity transformation because its preimage and image are similar figures.
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enlargement
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when the scale factor is greater than one
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reduction
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when the scale factor is between 0 and 1
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scalar multlipication
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the multiplication of each entry in a matrix by the same number, the SCALAR.
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