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Author:
Journal / Book Title:
Year:
Volume:
Issue:
shu qi shu xue zong he ce shi ti
Author(s):
YU Weixing
Pages:
77
-
82
Year:
2006
Issue:
Z2
Journal:
School Journal of Mathematics
Keyword:
数学竞赛
;
锐角三角形
;
正方形
;
多边形
;
综合测试题
;
平分线
;
直线
;
英语
;
线段
;
男生
;
Abstract:
<正>一、想一想,填一填(每题2分,共20分) 1.横穿马路是一种不文明的行为,如图1,从A处到B处许多人不走人行道而直接横穿马路的原因是____.2.如图2所示,直线AB与CD相交于O,若2∠1=∠2,OE⊥AB,则∠2=____,∠3=____.
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