大方形面积100平方,还有一个小方形,在这个大方形的每个边的中点上.问这个小方形的面积.
直接一个辅助线,连接小方形的对顶点.
可以看到构成2个三角形,可以看出每个三角形是其所在面积的一半,所以,这个小方形恰好是大方形的面积的一半,就是50平方
英语翻译The large square has an area of 100 square meters.The ve
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