8.1

[|dilation]-a transformation in which each point p has an image point p' such that a line conecting the two points passes through point O,know as the center of dialation,and OP' = k x OP, where k is the scale factor of the dialation. scale factor- in a transformation the number by which the distance ofthe preimage from the center of dilation is multiplied to determine the distance of the image point from the center. center of dilation- point in the dilation through which every line connecting a preimage point to an image point pases contraction- when the size of the figure is reduced by a dilation [|expansion] - when the size of the figure is enlarged by a dilation