Pentagonon[1] (Graece πεντάγωνον < πεντα- 'quinque' + γωνία 'angulus'), etiam 5-gon appellatum, in geometria est polygonon quinque angulorum vel laterum. Summa angulorum internorum in pentagono simplice est 540°.

Pentagonum regulare
Pentagonon aequilaterale, quod est pentagon quibus lateribus quinque sunt eadem longitudo.

Exempla pentagonorumRecensere

PlantaeRecensere

AnimaliaRecensere

MineraliaRecensere

Res artificiosaeRecensere

Pentagona in polyhedraRecensere

Ih Th Td O I D5d
           
Dodecahedron Pyritohedron Tetartoidum Icositetrahedron pentagonale Hexecontahedron pentagonale Trapezohedron truncatum

NotaeRecensere

  1. Oxford Latin Dictionary ed. P. G. W. Glare (Oxonii: Clarendon Press, 1968–1982), s.v. "pentagonos."

BibliographiaRecensere

  • Buchholz, Ralph H., et James A. MacDougall. 2008. "Cyclic polygons with rational sides and area." Journal of Number Theory 128 (1): 17–48. doi:10.1016/j.jnt.2007.05.005. MR 2382768. Editio interretialis.
  • Conway, John H., Heidi Burgiel, et Chaim Goodman-Strauss. 2008. "Generalized Schaefli symbols: Types of symmetry of a polygon." In The Symmetries of Things, capitulum 20, 275–78. ISBN 978-1-56881-220-5.
  • Meskhishvili, Mamuka. 2020. "Cyclic Averages of Regular Polygons and Platonic Solids." Communications in Mathematics and Applications 11: 335–55. Editio interretialis.
  • Robbins, D. P. 1994. "Areas of Polygons Inscribed in a Circle." Discrete and Computational Geometry 12: 223–36. doi:10.1007/bf02574377.