


Description 



Dilation: A transformation that changes the size of an object, but not the shape. 
The original image is the polygon labeled CDEFG. The image
after dilation is the polygon labeled C'D'E'F'G'. The scale factor can be
determined by the ratio:
r = length C'D'/length CD.
If this r < 1 then the image is smaller than the original
polygon. If this r > 1 then the image is larger than the original
polygon. If this r = 1 then the image is the same as the original
polygon.
A JavaSketchPad page is provided for you to explore dilations. Move any red point and observe
what happens. Try various positions for point P (i.e., inside and outside the
figure).


