Aperiodic set of prototiles seen on the list of aperiodic sets of tiles. The underlying undecidability of the domino problem implies that there exists no systematic procedure for deciding whether a given set of tiles can tile the plane. Polygons are plane figures which are bounded by straight line segments. Regular polygons have all sides of equal length as well as all angles of equal measure. As early as AD 325, Pappus of Alexandria knew that only 3 types of regular polygons (the square, equilateral triangle, and hexagon) can fit perfectly together in repeating tessellations on a Euclidean plane. Within that plane, every triangle,
All Sides All Sides All Sides is the sixth studio album by O.A.R., which was released on July 15, 2008 by Everfine Records, Lava Records and Atlantic Recording Corporation. Marc Roberge revealed in an interview with Songfacts that "Dinner Last Night" was inspired by an episode of "Seinfeld". The album was generally received negatively among professional reviewers. Rolling Stone attributes the album's failure to a change in the group's style, calling the album "a poor man's Goo Goo Dolls". Allmusic claims, "O.A.R. wasn't designed for Top 40 radio, which makes "All Sides"...disappointing." The album was the band's highest charting prior to the