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伊甸文苑 · 海外华文文学社区

Where does this hole come from?

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兰若
(@兰若)
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Interesting~


思无邪.


   
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(@luhua)
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interesting indeed. [url] http://www.uncommondescent.com/index.php/archives/1101 [/url]



   
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searain
(@searain)
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那2条长斜边不是直线。



   
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兰若
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都google到了,嘿嘿,我把历史当新闻啦~ 😀


思无邪.


   
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thesunlover
(@thesunlover)
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Faint. Is this the right answer? How could it be?

Originally posted by [i]searain[/i] at 2007-2-5 23:29:
那2条长斜边不是直线。


因为我和黑夜结下了不解之缘 所以我爱太阳


   
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searain
(@searain)
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to be clear, like the first post in the link [url] http://www.uncommondescent.com/index.php/archives/1101 [/url] said

"the hypotenuse is actually bi-linear in both pictures", the "hypotenuse" in both pictures is not really hypotenuse at all.



   
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兰若
(@兰若)
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Originally posted by [i]thesunlover[/i] at 2007-2-14 04:03 PM:
Faint. Is this the right answer? How could it be?

呵,别说你看不出来了,当时我跟我们办公室的那个俄国女孩两个把第一个图的每一片都剪下来拼到下一张图上都看不出区别来,最后我就算每一片的面积再加起来,再算整个三角形的面积,发现居然大三角形的面积小於加和,这就说明不该用三角形的公式来计算大三角形的面积,那么这个看似三角形的东东实际上是个四边形什么的,后来一古狗果然,嘿嘿~:lol:


思无邪.


   
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searain
(@searain)
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兰若和thesunlover大学里学的都是数理分析吧,兰若上次那题对我们来说那是天书。两位已经被训练得任何问题都往高难度高抽象方面想了。这题目,较多蒙住学数理分析的出“家“的专业的,较少蒙住学“高等数学”当“匠“专业的。

第一图,坐标点(0,0),(8,3),(13,5)相连。同样如果把第二图坐标点(0,0),(8,3),(13,5)相连,就会看到,第二图多出窄边区域。

也出一题目。
[box=#FF6666](更正,20年前做的题,记忆有误)[/box]
一块铁板上有正方形(边长10 cm),等腰三角形(底长和高10 cm),圆形(直径10 cm)三个孔,有没有办法做个塞子,可以严密无缝地通过这三个孔。



   
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兰若
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>>>>一块铁板上有正方形(边长10 cm),正三角形(边长10 cm),圆形(直径10 cm)三个孔,有没有办法做个塞子,可以严密无缝地通过这三个孔。

晕了 ~ 😉 我不是学 数理分析的, 不过在左理论倒是真的, 整天云里雾里的忽悠 ~ 🙂


思无邪.


   
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三川
(@三川)
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给兰兄拜晚年!
颁奖时,都是最后颁发一等奖,拜年,我就最后拜大腕。
兰兄总是不时地给我们出些数理难题。您的题跟您的诗一样,飘啊。


[url]http://blog.sina.com.cn/tugan[/url]


   
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兰若
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拜年拜年,这个题我是觉得蛮好玩的,跟大家分享分享哈,没想着难谁,您说话好像很您啊,俺受不了~ 嘿嘿~ 😆 叫兰兄好玩,继续哈~ 😀


思无邪.


   
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(@xzhao2)
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这个题觉得蛮好玩.

From left, check 9th square, you could see the 长斜边 moved up.


是非是我非我


   
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