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
How Many More Years songwriting for both sides of the record was originally credited to Carl Germany, who was a disc jockey and dance promoter in Chicago. The Chess label occasionally used composer credits on their records to repay favors to local businessmen who had helped their record sales. Later reissues of the recordings have given the songwriting credits to Chester Burnett. Following the record's success, Burnett moved to Chicago in 1953, and developed his career further in clubs and through recordings there, with a new band. Writer Robert Palmer has cited Willie Johnson's electric guitar work on the track as the first use