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Mathematics 9 Online
OpenStudy (anonymous):

The figures below are similar. What are a) the ratio of the perimeters and b) the ratio of the areas of the larger figure to the smaller figure? The figures are not drawn to scale.

OpenStudy (anonymous):

OpenStudy (anonymous):

the figures are not drawn to scale

OpenStudy (anonymous):

@TheSmartOne @sleepyjess

OpenStudy (anonymous):

the ratio of the perimeters will be the scale factor. The ratio of the areas will be the square of the scale factor

OpenStudy (anonymous):

Do you know how to find the scale factor?

OpenStudy (anonymous):

no I need help. @peachpi

OpenStudy (anonymous):

It asks for ratio of big to small, so divide 26/6 and reduce to get the scale factor

OpenStudy (anonymous):

13/3

OpenStudy (anonymous):

right. so that's the answer to (a). Square it to get the answer for (b)

OpenStudy (anonymous):

169/9

OpenStudy (anonymous):

yep

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