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The length of the side of a regular decagon of perimeter 80 cm is 10 cm.

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Detailed Solution

A regular decagon is a regular polygon of 10 sides.

∴ Perimeter of the regular decagon = (10 × Side)

The perimeter of the regular decagon is given as 80 cm.

Thus, the side of the regular decagon is $\frac{80 cm}{10} = 8 cm$ .

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