角GFA = 180 - (90-alpha) - (90-alpha)
角EFG = 角GFA /2 = alpha
所以三角形 EFG 和CFG 相似
可以得出EG= 0.5
CE = 0.5 + 2 = 2.5
图画的比较恶心,凑合着看。

角GFA = 180 - (90-alpha) - (90-alpha)
角EFG = 角GFA /2 = alpha
所以三角形 EFG 和CFG 相似
可以得出EG= 0.5
CE = 0.5 + 2 = 2.5
图画的比较恶心,凑合着看。

•
这个方法最简单:-)
-Jessy99-
♀
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11/28/2025 postreply
19:17:20
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