正方体外接圆锥一类截面面积的几个结论

Some Conclusions on the Sectional Area of the Cubic Circumscribed Cone of the Same Class

对经过正方体外接圆锥的两条母线的平面截该正方体得到的截面三角形 ,通过建立平面直角坐标系以及函数关系 ,确定截面面积的最大值、最小值 ,并确定取到最大值、最小值时的截面三角形。

When two generatrices pass through the cubic circumscribed cone,there forms a plane.Use the plane to cut the cube,and then get a section triangle.With the plane right angle coordinate and function relation made,fix the maximum and minimum of the sectional area,and the section triangle at that time.