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
How Many More Years of the power chord. T-Bone Burnett said of the recording: The first major breakthrough Sam [Phillips] made was with Howlin' Wolf. That's when he started bringing the bass and drums up loud. Back in those days the bass and drums were background instruments; it was all about the horns and the piano, the melody instruments, and Sam brought the rhythm section right up front, and that became rock 'n' roll. That was a big shift... In some ways "How Many More Years" by Wolf would be the first rock ’n’ roll song because that has the guitar lick that became