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Dilation: a transformation that changes the size of a figure but not it’s shape. The pre image and the image are always the same. Scale Factor: Describes how much the figure is enlarged or reduced. Show the dilation with scale factor of 2: M (0,0) E (2,4) R (3,0) Find the coordinates of S and the scale factor. M(0,8) E(0,4) L R(6,0) S Given: A(0,0) B (-1,1) C(3,2) D(-2,2) E (6,4) Prove: ∆ABC similar to ∆ADE In order the prove that they are similar by SSS similarity you find the distance between all the sides in both the original triangle and of the dilated triangle. Then use the similarity ratios that were shown in the previous example. Thanks for watching! #mathwithMER