Search
Subject Categories:
 Art (449)
 Asperger's (32)
 Blogging (10)
 China and the Han (9)
 eBay (3)
 Education (92)
 Fiction (28)
 Geography (27)
 History (37)
 Humor (46)
 Life (358)
 Mandalas (122)
 Mathematics (1,239)
 Mental Health (72)
 Music (43)
 Mysteries (16)
 Politics (120)
 Quotations (64)
 Religion (58)
 Satire (11)
 Science and Scientists (120)
 Follow RobertLovesPi.net on WordPress.com
MostViewed Posts, Recently:

Recent Posts
 The Double Icosahedron, and Some of Its “Relatives”
 Two Excellent Mathematical Websites
 The Compound of the Octahedron and the Small Stellated Dodecahedron
 A Zoo of Zonohedra
 Seven Different Facetings of the Truncated Icosahedron
 Four Symmetrohedra
 Some TenPart Polyhedral Compounds
 Augmenting the Dodecahedron with Great Dodecahedra
 Using Rhombic Triacontahedra to Build an Icosidodecahedron
 Augmenting the Icosahedron with Great Icosahedra
Explore RobertLovesPi By Topic
 Arkansas
 Art
 Asperger's
 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
 life
 mandala
 mandalas
 math
 mathematical
 mathematical art
 Mathematics
 music
 nonagon
 octagon
 octahedron
 op art
 pentagon
 physics
 politics
 polygon
 polyhedra
 polyhedral
 polyhedron
 president
 quotation
 quote
 religion
 rhombi
 rhombic dodecahedron
 rhombicosidodecahedron
 rhombic triacontahedron
 rhombus
 school
 science
 snub dodecahedron
 star
 stellated
 stellation
 symmetry
 tessellation
 tetrahedron
 tiling
 triangle
 Trump
 truncated icosahedron
 USA
 words
 zonohedron
Hit Counter
 328,872 hits
Tag Archives: pentadecagon
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
A Euclidian Construction of the Regular Pentadecagon (from 2011)
Because I did not start this blog until mid2012, I sometimes encounter things I made before then, but have not yet posted here. I made this image in 2011, after reading that the ancient Greeks discovered how to combine the … Continue reading
Posted in Mathematics
Tagged compass, construction, Euclidean, geometry, Mathematics, pentadecagon, puzzle, straight edge, straightedge
Leave a comment
Tessellation Featuring Regular Pentagons and Regular Pentadecagons
Other polygons included in this tessellation include several types of rhombi, as well as triconcave octadecagons. The pattern is chiral, but the chirality is subtle. (Hint: look near the pentagons.)
Posted in Mathematics
Tagged chiral, geometry, math, Mathematics, pentadecagon, pentagon, tessellation, tiling
Leave a comment
A Polyhedron Featuring Twelve Regular Pentadecagons, and Twenty Regular Enneagons
In the last post here, there were two polyhedra shown, and the second one included faces with nine sides (enneagons, also known as nonagons), as well as fifteen sides (pentadecagons), but those faces were not regular. The program I use … Continue reading
Posted in Mathematics
Tagged enneagon, geometry, nonagon, pentadecagon, polygon, polyhedra, polyhedral, polyhedron, regular
Leave a comment
Three Polyhedra Which Feature Regular Pentadecagons
I haven’t encountered many polyhedra which feature regular pentadecagons, and geometry textbooks generally don’t even use that word, calling them “15gons,” instead. The pentadecagon happens to be one of my favorite polygons, though, and has been ever since I independently … Continue reading
482Faced Polyhedron Featuring 32 Regular Pentadecagons
I’ve been obsessing about symmetrical polyhedra which include regular pentadecagons all day, and this is the latest result. I feel like I’m getting closer to what I’m looking for . . . but whatever it is I’m looking for seems … Continue reading