Let AB be 1 unit, the FH = [2* sqrt(3)/2 -1] /2 why?
The requested area ratio = (FH/AB)^2 = 2 - sqrt(3)
Let AB be 1 unit, the FH = [2* sqrt(3)/2 -1] /2 why?
The requested area ratio = (FH/AB)^2 = 2 - sqrt(3)
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太複雜了。 小正方形作對角線直通天地。 對角線長度等於 大正方形邊長 - 大邊長*tan(15),然後就簡單了。
-淺水魚-
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11/20/2025 postreply
18:56:05
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那好吧 !
-Yeli9008-
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11/20/2025 postreply
18:59:01
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