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
360 Degrees of Billy Paul At 16 I was working with Charlie Parker. He's one of the giants. Coming from a jazz background it was one of the greatest things to happen for any singer because of the fact I took an interest at heart but learned to build on it. When I say that I just didn't want to be labeled as a jazz singer but like my new album, the one that "Me & Mrs. Jones" is on, it's called "360 Degrees of Billy Paul" and that means I'm covering all of the territories." In its November 25, 1972, issue, "Billboard" wrote: "Billy