**Perimeter = 8a**

Area = ( 2 + 2√2 )a

Area = ( 2 + 2√2 )a

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A regular octagon is a eight sided polygon where each side is of equal length.

**Perimeter = 8a**

Area = ( 2 + 2√2 )a^{2}

Area = ( 2 + 2√2 )a

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