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A monogon is a two-dimensional polygon with a single edge. In Euclidean space, it is degenerate, with the edge being of zero length and the shape having no area, but it can exist as a tiling of the circle with the edge taking up the whole circle. Another name for it is henagon.

All monogons are regular, because they only have one vertex and one edge.

Structure and Sections

Hypervolumes

Subfacets

See Also

Regular polygons $ \{1\} $ $ \{2\} $ $ \{3\} $ $ \{4\} $ $ \{5\} $ $ \{6\} $ $ \{7\} $ $ \{8\} $ $ \{9\} $ $ \{10\} $ $ \{11\} $ $ \{12\} $ $ \{13\} $ $ \{14\} $ $ \{15\} $ $ \{16\} $ ... $ \{\aleph_0\} $
$ \{\frac{n}{1}\} $ Monogon Digon Triangle Square Pentagon Hexagon Heptagon Octagon Enneagon Decagon Hendecagon Dodecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon ... Apeirogon
$ \{\frac{n}{2}\} $ N/A N/A Triangle (retrograde) Degenerate Pentagram Degenerate Heptagram Degenerate Enneagram Degenerate Small hendecagram Degenerate Small tridecagram Degenerate Small pentadecagram Degenerate ... N/A
$ \{\frac{n}{3}\} $ N/A N/A N/A Square (retrograde) Pentagram (retrograde) Degenerate Great heptagram Octagram Degenerate Decagram Hendecagram Degenerate Tridecagram Tetradecagram Degenerate Small hexadecagram ... N/A
$ \{\frac{n}{4}\} $ N/A N/A N/A N/A Pentagon (retrograde) Degenerate Great heptagram (retrograde) Degenerate Great enneagram Degenerate Great hendecagram Degenerate Medial tridecagram Degenerate Pentadecagram Degenerate ... N/A
$ \{\frac{n}{5}\} $ N/A N/A N/A N/A N/A Hexagon (retrograde) Heptagram (retrograde) Octagram (retrograde) Great enneagram (retrograde) Degenerate Grand hendecagram Dodecagram Great tridecagram Great tetradecagram Degenerate Hexadecagram ... N/A
$ \{\frac{n}{6}\} $ N/A N/A N/A N/A N/A N/A Heptagon (retrograde) Degenerate Degenerate Degenerate Grand hendecagram (retrograde) Degenerate Grand tridecagram Degenerate Degenerate Degenerate ... N/A
$ \{\frac{n}{7}\} $ N/A N/A N/A N/A N/A N/A N/A Octagon (retrograde) Enneagram (retrograde) Decagram (retrograde) Great hendecagram (retrograde) Dodecagram (retrograde) Grand tridecagram (retrograde) Degenerate Great pentadecagram Great hexadecagram ... N/A
Regular
$ t_0 \{1\} $
Rectified
$ t_1 \{1\} $
Truncated
$ t_{0,1} \{1\} $
Monogon Monogon Digon