The edges form 72 flat regular decagons. The wire frame figure of the 600-cell consists of 72 flat regular decagons. Each vertex of the 600-cell is a vertex of six such decagons. It has 62 faces&colon; 30 squares, 20 regular hexagons, and 12 regular decagons. They are precisely the six decagons which form the wire frame figure of the icosidodecahedron. It has 92 faces&colon; 20 equilateral triangles, 60 isosceles triangles, and 12 decagons. It has 122 faces&colon; 12 decagons, 30 octagons, 20 hexagons, and 60 squares. The polygons on the perimeter of these projections are regular skew decagons. Six of these are the equatorial decagons to a pair of opposite vertices. U. It has 24 faces (12 pentagrams and 12 decagons), 90 edges, and 60 vertices. U. It has 26 faces (20 triangles and 6 decagons), 60 edges, and 30 vertices. U. It has 42 faces (30 squares and 12 decagons), 120 edges, and 60 vertices. Its vertex figure alternates two regular triangles and decagons as a crossed quadrilateral. Its vertex figure alternates two regular pentagons and decagons as a crossed quadrilateral.