Perimeter of a regular decagon is $900$ cm. What is the length of each side?

$90 c m$

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$100 c m$

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$112.5 c m$

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$118 c m$

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Solution

The correct option is A
$90 c m$

Given,
Perimeter of the decagon = $n u m b e r o f s i d e s \times l e n g t h o f e a c h s i d e$ = $900 c m$ .
We know that decagon have $10$ sides.
Therefore Length of each side of the given decagon = $\frac{900}{10} = 90 c m$ .
Hence Option A is Correct.

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