Octadecagon 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 as a quasiregular truncated enneagon, t{9}, which alternates two types of edges. As 18 = 2 × 3, a regular octadecagon cannot be constructed using a compass and straightedge. However, it is constructible using neusis, or an angle trisection with a tomahawk. The following approximate construction is very similar to that of the enneagon, as an octadecagon can be constructed as a truncated enneagon. It is also feasible with exclusive use of compass and straightedge. The "regular
A-Sides written by Chris Cornell, except where noted. Soundgarden Production A-Sides A-Sides is a compilation album by the American rock band Soundgarden with songs spanning the band's thirteen-year career. It was released on November 4, 1997, through A&M Records. The album was released in 1997 on A&M Records and was Soundgarden's last official release for 13 years, until 2010's "Telephantasm". It debuted at number 63 on the "Billboard" 200 album chart. "A-Sides" has sold over 500,000 copies in the United States according to Nielsen SoundScan and over 700,000 copies worldwide, but has not yet been certified by the RIAA. It peaked