《几何画板》是一个适用于研究平面几何、解析几何、射影几何问题的软件 ,遗憾的是“目前的版本对立体几何的表现并不方便”(见《几何画板实用手册》) ,但由于《几何画板》具备“能够动态地保持给定的几何关系”的强大功能 ,因此我们仍然可以利用《几何画板》的一些高级功能设 “Geometric Sketchpad” is a software suitable for studying plane geometry, analytical geometry, and projective geometry. Unfortunately, “the current version is inconvenient for the representation of solid geometry” (see the “Handbook of Geometry Sketchpad”) but due to Geometry Sketchpad has the power to dynamically maintain a given geometric relationship, so we can still use some of the advanced features of Sketchpad.