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A closed shape has 20 equal sides and one of its sides is 3 cm. Find its perimeter.

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A closed shape has 20 equal sides and one of its sides is 3 cm. Find its perimeter.

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Number of equal sides in the shape = 20

One of its side = 3 cm

Perimeter = length of one side × Number of equal sides

∴ Perimeter = (3 × 20) cm = 60 cm

∴ Perimeter = 60 cm

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