Question

Rectangle A′B′C′D′ is the image of rectangle ABCD after a dilation. What is the scale factor of the dilation?

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Answer 1

Scale factor: 1/2

Explanation:

Think of it as division.

From side B to C it is 3 units.

From side B' to C' it is 1.5 units.

I always start with 1/2 (if reduction) because it is most common.

3 divided by 2 = 1.5

/0.5 as a fraction is 1/2