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如图,直线l1∥l2,点A在直线l1上,以点A为圆心,适当长为半径画弧,分别交直...
如图,直线l
1∥l
2,点A在直线l
1上,以点A为圆心,适当长为半径画弧,分别交直线l
1、l
2于B、C两点,连接AC、BC.若∠ABC=54°,则∠1的大小为( )
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A.36°
B.54°
C.72°
D.73°
考点分析:
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