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 pentagonorum Recensere

Plantae Recensere

Animalia Recensere

Mineralia Recensere

Res artificiosae Recensere

Pentagona in polyhedra Recensere

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

Notae Recensere

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

Bibliographia Recensere

  • 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.