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The perimeter is the sum of the lengths of the sides if the shapes has straight sides. They can be measured with a ruler.

The perimeter of a circle can be calculated as diameter x pi where pi is 3.1416 the diameter can be measured.

The perimeter of an irregular shape can only be measured by a rotating wheel.

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8y ago

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You measure the individual segments, then add everything up.

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14y ago
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Q: How do you measure perimeter?
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