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
Mickey Mouse degrees of a B.A. degree in Education Studies. One thing these courses share is that they are "vocational", which are perceived to be less intellectually rigorous than the traditional academic degrees. Defenders of these courses object that the derogatory comments made in the media rely on the low symbolic capital of new subjects and rarely discuss course contents beyond the titles. Another factor is the correct or incorrect perception that the take up of these subjects, and the decline of more traditional academic subjects like science, engineering, mathematics, is causing annual grade rise in the United Kingdom. The A-level in General