什麼是角元ceva定理學習討論區 回應 d22538366 Re: 角元ceva 2011-07-08 10:29 設A1.B1.C1分別是三角形ABC的三邊BC.CA.AB 所在直線上的點.則三直線AA1.BB1.CC1平行或共點的充要條件為 (sin角BAA1)/(sin角A1AC)*(sin角ACC1)/(sin角C1CB) *(sin角CBB1)/(sin角B1BA)=1
d22538366 Re: 角元ceva 2011-07-08 10:29 設A1.B1.C1分別是三角形ABC的三邊BC.CA.AB 所在直線上的點.則三直線AA1.BB1.CC1平行或共點的充要條件為 (sin角BAA1)/(sin角A1AC)*(sin角ACC1)/(sin角C1CB) *(sin角CBB1)/(sin角B1BA)=1
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d22538366
Re: 角元ceva
2011-07-08 10:29所在直線上的點.則三直線AA1.BB1.CC1平行或共點的充要條件為
(sin角BAA1)/(sin角A1AC)*(sin角ACC1)/(sin角C1CB)
*(sin角CBB1)/(sin角B1BA)=1