In the picture below, we have triangle DEF that has been dilated from center O by scale factor r = triangle is noted by D'E'F. We also have a triangle D'EF, which is congruent to triangle DEF (i. e., A DEF =A D'EF). Describe the sequence of a dilation followed by a congruence (of one or more rigid motions) that would map triangle 1 2 The dilated d'E'T onto triangle D'EF.