What is the maximum number of nonover-lapping regions into which 3 lines can divide the interior of a circle?

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问题 What is the maximum number of nonover-lapping regions into which 3 lines can divide the interior of a circle?

选项 A、4
B、6
C、7
D、8
E、9

答案C

解析 3条直线最多可以把1个圆的内部分成多少个非重叠的区域? 本题很简单，答案是7个。

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