传奇故事：避开小狗
有一只狗，以10米长的绳子绑于木桩上。小高以木桩为中心站于狗的反侧。小狗欲咬小高因而追逐他。小高于是沿着半径10米的圆周而逃而逃。终于避开了小狗的追逐，获得安全，他如何做到的？（答案在下一页）
有一只狗，以10米长的绳子绑于木桩上。小高以木桩为中心站于狗的反侧。小狗欲咬小高因而追逐他。小高于是沿着半径10米的圆周而逃而逃。终于避开了小狗的追逐，获得安全，他如何做到的？（答案在下一页）
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