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11 Cards in this Set
- Front
- Back
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Image
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A shape that results from a transformation of a figure known as a preimage.
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Preimage
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The original figure in a transformation.
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Dilation
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A transformation in which the lines connecting every point P with it's preimage P' all intersect at a point C know as the center of the dilation and CP'/CP is the same for every point P; a transformation that changes the size of a figure but not its shape.
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Center of Dilation
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The intersections of the lines that connect each point of the image with the corresponding point of the preimage.
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Enlargement
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A dilation with a scale factor GREATER THAN 1. In an enlargement, the image is larger than the preimage.
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Reduction
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A dilation with a scale factor greater than 0 but less than 1. In a reduction, the image is smaller than the preimage.
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Scale Factor
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In a dilation, the ratio of a linear measurement of the image to the corresponding measurement of the preimage.
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Proportion
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An equation that states that two ratios are equal.
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Similar
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Two figures that have the same shape but not necessarily the same size.
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Similar Polygons
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Two polygons whose corresponding angles are congruent and whose corresponding sides are proportional.
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Similarity Ratio
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The ratio of two corresponding linear measurements in a pair of similar figures.
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