This Problem Set is a part of the Lesson 3, Unit 3, Grade 8. Students know that to shrink or magnify a dilated figure back to its original size from center O with scale factor As necessary, show students how to dilate a curved figure, namely, circle A (i.e., circle with center A). We want to find out how many points we need to dilate in order to develop an image of circle A from center of dilation O at the origin of the graph, with scale factor r = 3.