Concave polygon does not contain all other vertices in its edges and interior. The convex hull of the concave polygon's vertices, and that of its edges, contains points that are exterior to the polygon. Concave polygon A simple polygon that is not convex is called concave, non-convex or reentrant. A concave polygon will always have at least one reflex interior angle—that is, an angle with a measure that is between 180 degrees and 360 degrees exclusive. Some lines containing interior points of a concave polygon intersect its boundary at more than two points. Some diagonals of a concave polygon lie partly or
2.0 (98 Degrees album) 2.0 (98 Degrees album) 2.0 is the fifth studio album by American boy band 98 Degrees. The album was released on May 7, 2013 through eOne Music. It is their first studio album in thirteen years following "Revelation" (2000), The album was released by eOne Music, making it their first released through an independent record label rather than a major label like Motown or Universal Records. "2.0" debuted at number 65 on the "Billboard" 200, and number 12 on the Independent Album chart becoming the group's lowest-charting album since their 1997 debut album, "98 Degrees", which debuted at number 145.