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[几何] 直角三角形顶点在斜边上的射影轨迹是圆

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isee posted 2016-7-14 21:20 |Read mode
直角三角形的直角顶点在中心,斜边的端点椭圆上,则中心在斜边上的射影轨迹是圆。


此题偶真是算烦了。         
在《kuing网络撸题集》翻到这人,先标记下:命题 6.4.1


陈题再提,不知道有没高等几何的证明。主要这个直角突破不了,导致,这样的命题,偶至此止步。

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f(x) posted 2016-7-14 22:02
这个比较简单吧

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original poster isee posted 2016-7-14 22:18
回复 2# f(x)


     这表达口气,就是战巡啊!!!

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kuing posted 2016-7-14 23:02
回复 3# isee

肯定不是

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original poster isee posted 2016-7-15 10:32
哈哈,我信你

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游客 posted 2016-7-16 11:15
未命名.PNG

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original poster isee posted 2016-7-16 12:58
Last edited by isee 2016-7-16 13:05
    这个面积用得好!学习了。

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