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 <title><![CDATA[不共线三点确定的圆心怎么求？]]></title>
 <link><![CDATA[http://www.sjft.com/bbs/read.php?tid=17002]]></link>
 <description><![CDATA[Latest 20 replies of 不共线三点确定的圆心怎么求？]]></description>
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<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[不共线三点所确定的圆众所周知就是以该三点为顶点的三角形的
外接圆。该圆的圆心就是该三角形的
垂心。求三角形垂心
的最简单方法就是垂直平分线的交点了。不过在解析
几何中数字化的垂心不是很好求，有公式的。如果你有兴趣
的话可以上网查一下。]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173797]]></link>
 <author><![CDATA[acios]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Sun, 16 Sep 2001 14:29:07 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[怎么还有这么难的问题？]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173796]]></link>
 <author><![CDATA[虾米]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Sat, 15 Sep 2001 06:30:31 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[笨啊！！！画个圆，圆心还逃到哪里去啊！~]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173795]]></link>
 <author><![CDATA[冰冰钻石星]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Wed, 12 Sep 2001 02:11:22 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[难]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173794]]></link>
 <author><![CDATA[何人]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Mon, 10 Sep 2001 08:15:49 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[难道你在做家教？？？]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173793]]></link>
 <author><![CDATA[草木银棍]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Mon, 10 Sep 2001 06:06:26 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:回复:]]></title>
 <description><![CDATA[下面是引用Einstein于2001-9-10 9:09发表的回复:：
偶倒~~
别倒别倒，大家在这交流交流学习的事，有何不可啊
不过偶老实交代，偶也不会]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173792]]></link>
 <author><![CDATA[悠悠我心]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Mon, 10 Sep 2001 01:50:29 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[回复:]]></title>
 <description><![CDATA[偶倒~~]]></description>
 <link><![CDATA[http://www.sjft.com/bbs/job.php?action=topost&tid=17002&pid=173791]]></link>
 <author><![CDATA[Einstein]]></author>
 <category><![CDATA[电脑技术]]></category>
 <pubdate><![CDATA[Mon, 10 Sep 2001 01:09:00 +0000]]></pubdate>
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