To determine the scale factor used to enlarge the rectangle, I would need the original dimensions of the first rectangle and the dimensions of the enlarged rectangle. Since I don't have access to the image, I cannot provide a specific answer.
However, I can guide you through the process.
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Measure the length and width of the original rectangle.
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Measure the length and width of the enlarged rectangle.
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Use the formula for scale factor:
\[ \text{Scale Factor} = \frac{\text{Dimension of Enlarged Rectangle}}{\text{Dimension of Original Rectangle}} \]
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You can calculate the scale factor for both length and width. If both scale factors are the same, that is the scale factor for the enlargement.
Please provide the dimensions if you'd like me to calculate the scale factor for you.