Polycon

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In geometry, a polycon is a kind of a developable roller. It is made of identical pieces of a cone whose apex angle equals the angle of an even sided regular polygon.^[1][2] In principle, there are infinitely many polycons, as many as there are even sided regular polygons.^[3] Most members of the family have elongated spindle like shapes. The polycon family generalizes the sphericon. It was discovered by the Israeli inventor David Hirsch in 2017^[1]