Dilation (Reduce or Enlarge)

Adjust the scale factor [b]k[/b]. How does this effect the image?[br]Move points A, B, C, and D. How does this effect the image?
[size=200]Is the image [b]similar[/b] or[b] congruent[/b] to the preimage?[/size]
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– Jessica Lampert, Dtravis2

Information: Dilation (Reduce or Enlarge)