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Jay enlarged figure so that it was similar to figure . His diagram is shown at right. Homework Help ✎

  1. What is the scale factor?

    Read Math Notes box in Lesson 7.1.1 to determine how to write a scale factor.
    Remember a scale factor is a ratio (fraction).

  2. What is the value of ? How do you know?

    Which side of figure A corresponds to side in figure ?
    Multiply that side length by the scale factor you found in part (a).