1 2 3
4 5 6
7 8 9
第一条直线过1的圆心,2和5的切点 6的圆心
第二条直线过4的圆心,5和8的切点 9的圆心
第三条直线过3 5 7的圆心
如果是标准图形就行
九个圆,排成三排,三个一行,怎么样用三条直线把它们全部连起来?
九个圆,排成三排,三个一行,怎么样用三条直线把它们全部连起来?
数学人气:848 ℃时间:2020-01-25 08:28:36
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