The perimeter of a regular pentagon is 100 cm. How long is each sides?

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Solution

A regular pentagon is a closed polygon having five sides of equal length.
Perimeter of the regular pentagon = 100 cm
Perimeter of the regular pentagon = 5 × Side of the regular pentagon
Therefore, side of the regular pentagon = Perimeter $\div 5 = 100 \div 5 = 20$ cm

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