Concave 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 wholly outside the polygon. Some sidelines of a concave polygon fail to divide the plane into two half-planes one of which entirely contains the polygon. None of these three statements holds for
36 Degrees and the early legs of the "Meds" tour. It was also released as a B-side to the "Because I Want You" and "Song to Say Goodbye" singles under the title "36 Degrees 2005". It continues to be performed in various arrangements into 2016. Reviews of the song's performance during Placebo's "MTV Unplugged" concert stated that "‘36 Degrees’ (written by a 19-year-old Stefan and a 21-year-old Brian) becomes softer but it’s no less powerful as you’re drawn further into the lyrics of this song" and "In this setting ["36 Degrees"] becomes unexpectedly lush, underpinned by disarmingly subtle waves of piano and