# Geometry

A regular pentagon has side length 12cm.the perimeter of the pentagon is 60cm and the area is 247.7cm2 .a second. Pentagon has side lengths equal to 24cm .find the perimeter of the second pentagon

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3. 👁 350
1. Since perimeter is a linear measurement, the ratio of their perimeters is the same as the ratio of their sides.
The sides are doubled, so their perimeter is doubled, namely 120 cm

or

so 12/24 = 60/x
12x = 1440
x = 1440/12 = 120

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posted by Reiny
2. 120

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posted by Ellie

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