Think about the Equation

回答: 橫截麵為橢圓形可能有點問題。皆兄弟也2010-09-19 11:03:08

There is EQUATION:
X^2/a^2+Y^2/b^2+Z^2/c^2=1,
If a=b=c :all cut face are circles.
a=b not=c,one circle.
a,b,c, total different,no circle.
two circles are impossible.

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You are great. I agree two circles are impossible. -皆兄弟也- 給 皆兄弟也 發送悄悄話 皆兄弟也 的博客首頁 (237 bytes) () 09/19/2010 postreply 13:38:35

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