murphysun 发表于 2005-7-20 20:04:00

如何找共切线

<P><?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600">我是菜鸟，刚学到捕捉！&nbsp;如何找到A，B两圆的共切线？</v:shapetype></v:shapetype></P>
<P><v:shapetype stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:shapetype stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600">&nbsp;</v:shapetype></v:shapetype></v:shapetype></P>

hell0 发表于 2005-7-20 22:57:00

<P>直接用捕捉切点即可,</P>

vosen 发表于 2005-7-21 00:03:00

<P>楼上的方法有时不行</P>
<P>建设用XLINE去找</P>
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