In the figure above, what is the maximum number of nonoverlapping regions into which the shaded
问题描述：
In the figure above, what is the maximum number of nonoverlapping regions into which the shaded
area can be divided using exactly two straight lines? 问题是什么意思啊..看不懂诶...图就是两个一大一小的同心圆,阴影部分是圆环,
答
在上图中,没重叠部分的最大数是什么,没重叠部分（阴影部分）可用两条直线隔开.
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