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双角平分线模型的结论
更新时间: 2021-03-27 14:42:45  

1、内加:如果是三角形的两个内角的角平分线相交所形成的的角度就是“90°+”一半的∠A;

2、外减:如果是三角形的两个外角的角平分线相交所形成的的角度就是“90° -”一半的∠A;

3、不内不外,不加不减:如果既不全是内角,也不全是外角,而是一个内角一个外角的角平分线相交,则既不“+”也不“-”90°,直接等于一半的∠A.

关键词: 平分 模型 结论

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