Octadecagon and 2{9/4} or two enneagrams, {18/6} is reduced to 6{3} or 6 equilateral triangles, and finally {18/9} is reduced to 9{2} as nine digons. Deeper truncations of the regular enneagon and enneagrams can produce isogonal (vertex-transitive) intermediate octadecagram forms with equally spaced vertices and two edge lengths. Other truncations form double coverings: t{9/8}={18/8}=2{9/4}, t{9/4}={18/4}=2{9/2}, t{9/2}={18/2}=2{9}. The regular octadecagon is the Petrie polygon for a number of higher-dimensional polytopes, shown in these skew orthogonal projections from Coxeter planes: Octadecagon An octadecagon (or octakaidecagon) or 18-gon is an eighteen-sided polygon. A "regular octadecagon" has a Schläfli symbol {18} and can be constructed
B Sides and C Sides B Sides and C Sides B Sides and C Sides is a compilation album by the American punk rock band Rancid. It was first released online on December 11, 2007, followed by a standard release on January 15, 2008. It contains a number of B-sides and rare songs as well as compilation or soundtrack appearances plus 4 previously unreleased songs. The set spans from 1992 to 2004, therefore it doesn't include any songs recorded with current drummer Branden Steineckert. "B Sides and C Sides" is also notable as being the band's first release since their hiatus in 2004, along with