Look at quadrilateral PQRS and its scaled image P'Q'R'S'. What scale factor was used for the scaled image? Explain how you determined this.
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The scaled factors would be 2.5 becuz the triangles are similar, you can use the proportion to find that 15/6 = 2.5 and 10/4 = 2.5, and 20/8 = 2.5. Since the proportions are the same the scale factor would be 2.5.