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2019春七年级数学下册第二章《相交线与平行线》2.1两条直线的位置关系第1课时两条直线相交所成的角习题课件（新版）北师大版.ppt

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第二章 相交线与平行线 2.1 两条直线的位置关系 第1课时 两条直线相交所成的角,一个,不相交,直角,互为补角,对顶角,等角,同角,相等,D,D,25,180,90,180,同角的余角相等,C,A,等角的补角相等,A,

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