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[病例]李大爷用12块1米长的栅栏,并借助一堵墙围成一个长方形羊圈(正方形可以看作特殊的长方形)o怎样围面积最大呢?最大面积是多少?[病症1]在周长一定的情况下,正方形的面积比一般长方形的面积大,根据栅栏共长12个1米,可知正方形的周长是12
[Case] Uncle Lee used 12 1-meter-long fences and surrounded by a wall into a rectangular sheepfold (the square can be regarded as a special rectangle). How to enclose the largest area? What is the maximum area? [Illness 1] In the circumstance of a certain circumstance, the area of the square is larger than the area of the general rectangle. According to the total length of the fence of 12 1 meter, the perimeter of the square is 12