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
Long Forgotten Songs: B-Sides & Covers 2000–2013 charted in several other countries. The album received generally favorable reviews; several critics said the covers were the best aspect of the album, and noted how many of the songs felt fully fleshed out despite being relegated to B-sides. While backstage at the 2013 Orion Music + More festival, the members of Rise Against attempted to catalog their lesser known B-sides and covers, but came to the conclusion that there were some songs that they did not own copies of. These songs were often included in Fat Music compilation albums or soundtrack albums. As lead singer Tim McIlrath put it: