数学题怎么证明3点共线咋正四边形ABCD为正方形,E为CD中点,F为CE中点.求证角BAF=2角DAE
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![数学题怎么证明3点共线咋正四边形ABCD为正方形,E为CD中点,F为CE中点.求证角BAF=2角DAE](/uploads/image/z/13199278-22-8.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98%E6%80%8E%E4%B9%88%E8%AF%81%E6%98%8E3%E7%82%B9%E5%85%B1%E7%BA%BF%E5%92%8B%E6%AD%A3%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%BA%E6%AD%A3%E6%96%B9%E5%BD%A2%2CE%E4%B8%BACD%E4%B8%AD%E7%82%B9%2CF%E4%B8%BACE%E4%B8%AD%E7%82%B9.%E6%B1%82%E8%AF%81%E8%A7%92BAF%3D2%E8%A7%92DAE)
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数学题怎么证明3点共线咋正四边形ABCD为正方形,E为CD中点,F为CE中点.求证角BAF=2角DAE
数学题怎么证明3点共线
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四边形ABCD为正方形,E为CD中点,F为CE中点.求证角BAF=2角DAE
数学题怎么证明3点共线咋正四边形ABCD为正方形,E为CD中点,F为CE中点.求证角BAF=2角DAE
http://www.i3721.com/gz/tbjak/g1/g1sx/200606/70587.html
http://www2.chinaedu.com/101resource004/wenjianku/200412/101ktb/lanmu/XF1S0136/XF1S0136.htm
取其中两点求出这两点确定的直线方程,第三个点在这直线上则表明三点共线,反之,不共线。