(geometry) A polygon with ten sides and ten angles.
A polyhedron with ten faces.
A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.
A solid figure or body inclosed by ten plane surfaces.
a polygon with 10 sides and 10 angles
any polyhedron having ten plane faces
In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, ) is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°.
In geometry, a decahedron is a polyhedron with ten faces. There are 32300 topologically distinct decahedra, and none are regular, so this name does not identify a specific type of polyhedron except for the number of faces.