正方体是空间立体几何中一个重要的几何模型,那么正方体的截面都有哪些可能呢?我们来研究一下.首先,平面α和几何体相交所得到的平面图形(包括它的内部),叫做这个几何体的截面.由此可见,截面是由平面α和几何体各面的交线所围成的封闭图形.平面α和正方体各面的交线都是线段,因此正方体的截面都是平 A cube is an important geometric model of spatial solid geometry, so what are the possible cross-sections of the cube? Let’s look at it. First, the plane figure (including its interior) from the intersection of the plane α with the geometry is called the geometry Therefore, the cross section is a closed figure surrounded by the intersection of the plane α and the surface of the geometry, and the intersection of the plane α and each side of the cube is a line segment, so the cross section of the cube is flat