江苏省宿迁市泗洪县2018届中考数学专题复习第六章三角形(第1课时)练习(无答案).doc

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1、1学校 班级 姓名_考号_考试时间_装订线内不要答题装订线 三角形一、选择题1如图 K161,经过刨平的木板上的两个点,能弹出一条笔直的墨线,而且只能弹出一条墨线, 能解释 这一实际应用的数学知识是( )图 K161A两点确定一条直线B两点之间,线段最短C垂线段最短D在同一平面内,过一点有且只有一条直线与已知直线垂 直22016 长沙下列各图中,1 与2 互为余角的是( )图 K16232017山西如图 K163,直线 a、b 被直线 c所截,下列条件不能判定直线 a与 b 平行的是 ( )A13 B24180 C14 D34图 K16342017自贡如图 K164,ab,点 B在直线 a上,

2、且 ABBC, 135,那么2( )A45 B50 C55 D60卷面分2图 K16452017烟台某城市几条道路的位置关系如图 K165 所示,已 知 ABCD,AE与 AB的夹角为 48,若 CF与 EF的长度相等,则C 的度数为( )图 K165A48 B40 C30 D24二、填空题62016雅安1.45_.7如果A35,那么A 的余角等于_;A 的补角为_82017贵港 如图 K166,ABCD,点 E在 AB上,点 F在 CD上,如果CFEEFB34, ABF40,那么BEF 的度数为 _图 K1669一个角的余角的 3倍比它的补角的 2倍少 120,则这个角的度数为_三、解答题102017重庆A 如图 K167,ABCD,点 E是 CD上一点,AEC42,EF平分AED 交 AB于点 F,求AFE 的度数3112017枣庄如图 K168,将一副三角板和一张对边平行的纸条按下列方式摆放,两个三角板的一直角边重合,含 30角的直角三角板的斜边与纸条一边重合,含 45角的三角板的一个顶点在纸条的另一边上,则1 的度数是( )A 15 B22.5 C30 D45图 K168

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