动态立体几何与最值(或值域)问题

Problem on Dynamic Solid Geometry and Range

试图探索动态立体几何与最值或值域问题 ,寻找其解题途径、规律和策略 ;立体几何最值是运动图形所确定的特殊数值 ,求立体几何最值问题 ,往往利用转化法反映图形的变化规律。

This report tries to explore questions concerning dynamic solid geometry and its relations with threshold value and range in order to find out the tactics of solving the geometric problems.A particular threshold value is predetermined by the dynamic graph.And the study of threshold value of solid geometry often makes use of transformational method to mark its way of changes.