EntityQ12243537· pop 23· linked from 129 articlesconcave polygonSign in to savesimple polygon which is not convexConnectionsquadrilateralEntityparallelogramEntitytrapezoidEntitykiteEntitytriangleEntityInternational Standard Book NumberEntityangleEntitysquareEntityrectangleEntitypolygonEntityrhombusEntitydigital object identifierEntitypentagonEntityradianEntityhexagonEntityright triangleEntityequilateral triangleEntityoctagonEntitydiagonalEntityheptagonEntityCategoriesTypes of polygons