Icosagon

Icosagon
Dimensionality	2
Schläfli Symbol	'"`UNIQ--postMath-00000001-QINU`"'
Symmetry	Icosagonal dihedral symmetry (D20)
Topology
Equivalent Manifold	'"`UNIQ--postMath-00000002-QINU`"' Disk
Euler Characteristic	1
Subfacets
Vertices	20 points
Edges	20 line segments
Faces	1 icosagon
Hypervolumes
Vertex Count	'"`UNIQ--postMath-00000003-QINU`"'
Edge Length	'"`UNIQ--postMath-00000004-QINU`"'
Surface Area	'"`UNIQ--postMath-00000005-QINU`"'

An icosagon is a 2-dimensional polygon with twenty edges.

Structure and Sections

The regular icosagon has each angle at 162 degrees. It can be seen as a truncated decagon.

See Also

Regular $t_0 \{10\}$	Rectified $t_1 \{10\}$	Truncated $t_{0,1} \{10\}$
Decagon	Decagon	Icosagon

Regular $t_0 \{20\}$	Rectified $t_1 \{20\}$	Truncated $t_{0,1} \{20\}$
Icosagon	Icosagon	Tetracontagon