In this lesson, we are going to go over the fourth and final transformation, and that is dilation. Dilation is a transformation that alters the size of a geometric figure, but does not change the shape. The first three transformations that we went over (those were translation, reflection, and rotation) are all congruence transformations. Dilation is the only transformation that is not a congruence transformation. The scale factor (we are going to use k as the scale factor) is the ratio between the image and the pre-image. You'll see what happens when k is positive, and when k is negative.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.