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Preserving congruence

Questions (2)

Dana draws an F on a clear piece of plastic. Which transformation would fail to preserve congruence?turning the piece of plastic
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2. asked anonymously
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Which of the following transformations does not preserve congruence?(pick an answer) (x,y) (-y,-x) (x,y) (9x,9y) (x,y) (x+9,y+9)
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2. asked by silent
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