Search
Subject Categories:
 Art (423)
 Asperger's (32)
 Blogging (9)
 China and the Han (9)
 eBay (3)
 Education (89)
 Fiction (27)
 Geography (27)
 History (37)
 Humor (43)
 Life (352)
 Mandalas (119)
 Mathematics (1,174)
 Mental Health (71)
 Music (43)
 Mysteries (14)
 Politics (111)
 Quotations (63)
 Religion (58)
 Satire (7)
 Science and Scientists (115)
 Follow RobertLovesPi's Blog on WordPress.com
MostViewed Posts, Recently:

Recent Posts
 Meditating and Not
 Thoughts on Colonizing Space
 On Taxation, and Representation, in Public Education
 A Rhombic Dodecahedron, Made of Icosahedra, and Tall Triangular Antiprisms
 Honeycomb Made of Cuboctahedra and Octahedra
 Spectral Circles on a Cuboctahedron
 Spectral Circles on a Truncated Icosahedron
 Spectral Circles
 Heptagrammic
 June 13 Special Election in the PCSSD
Explore RobertLovesPi By Topic
Arkansas Art Asperger's Aspie astronomy atheism atheist chemistry chiral circle cluster compound cube cuboctahedron dodecahedron dual Education enneagon faceted faceting geometric geometrical geometrical art geometry Golden Ratio hexagon Humor humour icosahedron icosidodecahedral icosidodecahedron kite language life mandala mandalas math mathematical mathematical art Mathematics music nearmiss nonagon octagon octahedron op art pentagon physics politics polygon polyhedra polyhedral polyhedron quotation quote religion rhombic dodecahedron rhombicosidodecahedron rhombic triacontahedron rhombus school science snub dodecahedron star stellated stellation symmetry tessellation tetrahedron tiling triangle truncated icosahedron USA words zonohedronHit Counter
 235,270 hits
Tag Archives: nonagon
Two Polyhedra, Each Featuring Enneagons and Octagons
I used Stella 4d: Polyhedron Navigator to make these. You can try it for yourself at http://www.software3d.com/Stella.php.
Posted in Mathematics
Tagged enneagon, geometry, Mathematics, nonagon, octagon, polyhedra, polyhedron
Leave a comment
A Polyhedron Made of Enneagons and Pentagons
This polyhedron has 20 enneagons and 12+60=72 pentagons (of two types) as faces. I made it using Stella 4d, which is available at http://www.software3d.com/Stella.php.
Posted in Mathematics
Tagged enneagon, geometry, Mathematics, nonagon, pentagon, polyhedra, polyhedron
Leave a comment
Three Convex Polyhedra with Tetrahedral Symmetry, Each Featuring Four Regular Enneagons
In addition to the four regular enneagons, the polyhedron above also has rhombi and isosceles triangles as faces. The next one, however, adds equilateral triangles, instead, to the four regular enneagons, along with trapezoids and rectangles. Only the last of … Continue reading
Posted in Mathematics
Tagged enneagon, geometry, Mathematics, nonagon, polyhedra, polyhedron, symmetrohedron, tetrahedral
1 Comment
Tessellation Using Regular Enneagons, Rhombi, and Hexaconcave Dodecagons
Posted in Mathematics
Tagged enneagon, geometry, Mathematics, nonagon, tessellation, tiling
1 Comment
Nine (2015) / Nine (2013)
First, the newer version I just made: Next, the 2013 version, which I recently found, along with a bunch of other previouslylost stuff from around then. The two are simply colorinversions of each other, according to the rules for colorinversion … Continue reading
Posted in Art, Mathematics
Tagged Art, enneagon, enneagram, geometric, geometrical, geometry, mathematical, Mathematics, nine, nonagon, nonagram
2 Comments