推 ddczx: 你設CGE=1 FGE=k 然後利用CGB:FGB=1:k 就弄得出來了 09/30 16:27
→ justin0602: 請問d大可以再詳細點嗎? 09/30 17:50
→ ddczx: CEF=1+k=1/2(CDF)=3/16(ABCD) -> ABCD=(16/3)(1+k) 09/30 19:51
→ ddczx: CGB = CEB-CEG = (1/4)(ABCD)- 1 = 1/3 + (4/3)k 09/30 19:54
→ ddczx: FGB一樣弄出來 然後利用CGB:FGB=1:k 就可解出k 09/30 19:55
→ theoculus: 令 ABCD 面積 = k 10/01 00:38
→ theoculus: ABF = (1/6)k , DEF = (1/6)k , BCE = (1/4)k 10/01 00:40
→ theoculus: 請無視上面這行 10/01 00:42
→ theoculus: ABF = (1/8)k , DEF = (3/16)k , BCE = (1/4)k 10/01 00:44
→ theoculus: BEF = (1 - 1/8 - 3/16 - 1/4) = (7/16)k 10/01 00:48
→ theoculus: CG:FG長度 = BCE : BEF面積 = 1/4 : 7/16 10/01 00:49