Three Dimensional Geometric Shapes. From The Cyclopaedia Or Universal Dictionary Of Arts, Sciences And Literature By Abraham Rees, Published London...
Polyhedral block dial of unknown origin, the block is a pentagon dodecahedron with sundial incisions on three faces.幾何圖形
moody close-up of a twelve-sided die sitting on a wood table with a dark background with copy space - 十二面體 個照片及圖片檔
