Similarity and Scale Factor

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If two similar rectangles have lengths 8 cm and 12 cm, what is their scale factor?

The scale factor is $\frac{12}{8} = 1.5$.

If a shape is enlarged by a scale factor of 4, what happens to the dimensions?

All dimensions of the shape are multiplied by 4.

What does the scale factor represent?

The scale factor is the ratio of the lengths of corresponding sides of two similar shapes.

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