Search
Subject Categories:
 Art (433)
 Asperger's (32)
 Blogging (9)
 China and the Han (9)
 eBay (3)
 Education (91)
 Fiction (28)
 Geography (27)
 History (37)
 Humor (46)
 Life (355)
 Mandalas (121)
 Mathematics (1,197)
 Mental Health (72)
 Music (43)
 Mysteries (16)
 Politics (116)
 Quotations (64)
 Religion (58)
 Satire (9)
 Science and Scientists (120)
 Follow RobertLovesPi's Blog on WordPress.com
MostViewed Posts, Recently:

Recent Posts
 Two Polyhedra Featuring Regular Pentadecagons
 The Moon Unit Proposal
 Four Polyhedra Featuring Enneagons
 Throwing Star Tessellation
 Tessellation of Triangles and Pentagons
 The C320 Fullerene Polyhedron
 The Construction of a Zome Model of a 240Atom Fullerene Molecule, In Seven Pictures
 A Faceting of the Rhombcuboctahedron
 The Truncated Stella Octangula
 Tiles
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
 256,581 hits
Monthly Archives: October 2017
Two Polyhedra Featuring Regular Pentadecagons
This polyhedron has 92 faces: twelve regular pentadecagons, twenty equilateral triangles, and sixty isosceles triangles, each with a vertex angle of ~42.5°. Its first stellation appears below. Both models were created using Stella 4d, software you can try for yourself … Continue reading
Posted in Mathematics
Tagged geometry, Mathematics, pentadecagon, polyhedra, polyhedron
Leave a comment
The Moon Unit Proposal
I propose that 384,400 km (238,855 miles), the average distance from the Earth to the Moon, be called a “moon unit.” Example: “The mileage of my car is over one moon unit.”
Four Polyhedra Featuring Enneagons
Enneagons are also called nonagons; they are polygons with nine sides. I used Stella 4d to make these four rotating polyhedra, and you may try this program for yourself at http://www.software3d.com/Stella.php.
Posted in Mathematics
Tagged enneagon, geometry, Mathematics, nonagon, polyhedra, polyhedron
Leave a comment
Tessellation of Triangles and Pentagons
Alternately, this can be seen as a tessellation of hexagons and enneagons. Which do you see?
Posted in Mathematics
Tagged enneagon, geometry, hexagon, Mathematics, nonagon, pentagon, tessellation, triangle
2 Comments
The C320 Fullerene Polyhedron
The duals of the geodesic domes are polyhedra with hexagonal and pentagonal faces. This particular one has 320 vertices, with those vertices representing carbon atoms. Here is C320 as a polyhedron. The next image shows this molecule as a ballandstick … Continue reading
Posted in Mathematics, Science and Scientists
Tagged 320, c, C320, carbon, chemistry, fullerene, geometry, Mathematics, molecular, molecule, polyhedra, polyhedron, science
2 Comments
The Construction of a Zome Model of a 240Atom Fullerene Molecule, In Seven Pictures
You can buy your own Zome at http://www.zometool.com.