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7-8.
  1. Jay enlarged figure A so that it was similar to figure B. His diagram is shown at right. Homework Help ✎

    1. What is the scale factor?

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

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).

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