凹おう多た角かく形けいおうたかくけいじ字FuriganaMeanings1nounconcave polygon; non-convex polygongeometry›Technical geometry term for a polygon with at least one interior angle greater than 180 degrees. Contrasts with 凸多角形 (convex polygon).See also: 凸多角形凹おう多た角かく形けいは少すくなく
