3198 Polygon Encoder
1500 Polygonal Puzzle
1640 Poly-polygonal Numbers
1179 Polygon
2043 Area of Polygons
2747 Shy Polygons
2684 Polygonal Line Search
3135 Polygons on the Grid
2007 Scrambled Polygon
1389 Area of Simple Polygons
2401 Street Polygon
1940 Polygon Programming with Ease
2462 Cutting a polygon
3293 Rectilinear polygon