• Thumbnail for Decagon
    Decagon (category Constructible polygons)
    (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is...
    15 KB (1,851 words) - 07:19, 1 July 2024
  • Thumbnail for 257-gon
    257-gon (category Constructible polygons)
    In geometry, a 257-gon is a polygon with 257 sides. The sum of the interior angles of any non-self-intersecting 257-gon is 45,900°. The area of a regular...
    5 KB (577 words) - 10:49, 28 February 2024
  • Thumbnail for Bifrustum
    dipyramids. "Octagonal Bifrustum". etc.usf.edu. Retrieved 2022-06-16. "Regelmäßiges Bifrustum - Rechner". RECHNERonline (in German). Retrieved 2022-06-30...
    4 KB (258 words) - 18:42, 1 December 2023
  • Thumbnail for 600-cell
    of polygons of each kind pass through each vertex; so it is possible to account for all 120 vertices as the intersection of a set of central polygons of...
    217 KB (28,933 words) - 14:34, 25 September 2024