A pentagon is a 2-dimensional polygon with five edges. The Bowers acronym for a pentagon is peg. It is called a cosmogon, hydrogon, or a rhodogon under the elemental naming scheme.

Structure and Sections

The regular pentagon has equal edges and each angle being 108 degrees.


  • vertex count = 5
  • edge length = 5l
  • surface area = \frac{\sqrt{5(5+2\sqrt{5})}}{4} {l}^{2}


See Also

\{1\} \{2\} \{3\} \{4\} \{5\} \{6\} \{7\} \{8\} \{9\} \{10\} ... \{\aleph_0\}
Monogon Digon Triangle Square Pentagon Hexagon Heptagon Octagon Enneagon Decagon ... Apeirogon
t_0 \{5\}
t_1 \{5\}
t_{0,1} \{5\}
Pentagon Pentagon Decagon
Zeroth First Second Third Fourth Fifth
Cosmotopes Point Line segment Pentagon Dodecahedron Hecatonicosachoron Order-3 Hecatonicosachoron honeycomb
Hydrotopes Point Line segment Pentagon Icosahedron Hexacosichoron Order-5 Pentachoron honeycomb

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