求最值是各类考试中的热点题型,其中有一类在几何图形中求最值的问题,由于几何图形(或几何元素)位置(或大小)不确定,使许多同学倍感棘手.如果引进参数,相对“固定”几何图形(或几何元素),将其转化为位置(或大小)确定的问题,就可突破障碍,化难为易.例1(2014连云港市)如图1,已知线段AB=8,点P为AB上的一个动点,分别以AP、BP为边在同侧作正方形APDC、 One of the most popular questions in exams is finding the best value in geometry. Many students find it tricky because of the uncertainty in the location (or size) of the geometry (or geometry) Example 1 (2014 Lianyungang City) As shown in Figure 1, the introduction of parameters, relative to the “fixed” geometry (or geometric elements), into the problem of determining the location (or size) Known line segment AB = 8, the point P is a moving point on the AB, with AP, BP side in the same side for the square APDC,