画图有点麻烦,求求你们,今天一顶要弄出来.普通锐角三角形ABC中,点O是AC上的一个动点,过点O作MN‖BC交角BCA的平分线于点E,交角BCA外角平分线于点F,1 求证EO=FO.2 当点O运动到何处时,四边形,AECF是
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![画图有点麻烦,求求你们,今天一顶要弄出来.普通锐角三角形ABC中,点O是AC上的一个动点,过点O作MN‖BC交角BCA的平分线于点E,交角BCA外角平分线于点F,1 求证EO=FO.2 当点O运动到何处时,四边形,AECF是](/uploads/image/z/6368734-46-4.jpg?t=%E7%94%BB%E5%9B%BE%E6%9C%89%E7%82%B9%E9%BA%BB%E7%83%A6%2C%E6%B1%82%E6%B1%82%E4%BD%A0%E4%BB%AC%2C%E4%BB%8A%E5%A4%A9%E4%B8%80%E9%A1%B6%E8%A6%81%E5%BC%84%E5%87%BA%E6%9D%A5.%E6%99%AE%E9%80%9A%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E7%82%B9O%E6%98%AFAC%E4%B8%8A%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E8%BF%87%E7%82%B9O%E4%BD%9CMN%E2%80%96BC%E4%BA%A4%E8%A7%92BCA%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E4%BA%8E%E7%82%B9E%2C%E4%BA%A4%E8%A7%92BCA%E5%A4%96%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E4%BA%8E%E7%82%B9F%2C1+%E6%B1%82%E8%AF%81EO%3DFO.2+%E5%BD%93%E7%82%B9O%E8%BF%90%E5%8A%A8%E5%88%B0%E4%BD%95%E5%A4%84%E6%97%B6%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2%2CAECF%E6%98%AF)
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