tplesha+ch.8

ch. 8.1 Definitions- __dilation__ - a transformation that is not rigid. dilations preserve the shape of an object, but they may change it's size.

A dilation of a point in a coordinate plane can be found by multiplying the x- and y- coordinates of a point by the same number, t. D(x, y) = (x, ty) the t is called the __scale factor__ of the transformation