High Quality Content by WIKIPEDIA articles! In geometry an equilateral pentagon is a polygon with five sides of equal length. Its five internal angles, in turn, can take several values, thus permitting to form a family of pentagons. In contrast, the regular pentagon is unique, because is equilateral but at the same time its five angles are equal. Four intersecting equal circles disposed in a closed chain, are sufficient to describe an equilateral pentagon. Every center of the circles corresponds to one of four pentagon vertexes. The remain vertex is determined by the intersection of the first and the last circle of the chain.

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