Typical shapes are rectangles, hexagons, and octagons. Pentagons have a peculiar relationship with hexagons. These gaps can be filled with regular hexagons and isosceles triangles. Examples include magic circles, magic rectangles, magic triangles magic stars, magic hexagons, magic diamonds. The 1963 Cinerama Dome was built from precast concrete hexagons and pentagons. Eyewalls are typically circular; however, distinctly polygonal shapes ranging from triangles to hexagons occasionally occur. A chamferred hexagonal tiling replacing edges with new hexagons and transforms into another hexagonal tiling. Users can use squares, circles, ellipses and hexagons for the mark zone. This is the basis for an infinite tiling of the hexagon with hexagons. The map is subdivided into a hexagonal tiling, small regular hexagons of identical size. Figurate numbers representing hexagons (including six) are called hexagonal numbers. It has 62 faces&colon; 30 squares, 20 regular hexagons, and 12 regular decagons. The i4 forms are regular hexagons flattened or stretched along one symmetry direction. The game board consisted of 20 interlocking yellow hexagons, arranged in five columns of four. The edges of a cuboctahedron form four regular hexagons.