有4条线段长分别为2.4.6.7,从中任选3条,能构成三角形的概率为多少1.三角形ABC中角A=X度,分别作角ABC的角平分线BA1和角ACM角平分线CA1.两线相交于点A1,同理,作角A1BC的角平分线BA2和角A1CM角平分线C
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![有4条线段长分别为2.4.6.7,从中任选3条,能构成三角形的概率为多少1.三角形ABC中角A=X度,分别作角ABC的角平分线BA1和角ACM角平分线CA1.两线相交于点A1,同理,作角A1BC的角平分线BA2和角A1CM角平分线C](/uploads/image/z/8847830-38-0.jpg?t=%E6%9C%894%E6%9D%A1%E7%BA%BF%E6%AE%B5%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BA2.4.6.7%2C%E4%BB%8E%E4%B8%AD%E4%BB%BB%E9%80%893%E6%9D%A1%2C%E8%83%BD%E6%9E%84%E6%88%90%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA%E5%A4%9A%E5%B0%911.%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%E8%A7%92A%3DX%E5%BA%A6%2C%E5%88%86%E5%88%AB%E4%BD%9C%E8%A7%92ABC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFBA1%E5%92%8C%E8%A7%92ACM%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFCA1.%E4%B8%A4%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9A1%2C%E5%90%8C%E7%90%86%2C%E4%BD%9C%E8%A7%92A1BC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFBA2%E5%92%8C%E8%A7%92A1CM%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFC)
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