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【河北省石家庄地区2022-2023学年八年级上学期期末考试数学试题(原卷版)

  • 2026-02-25 04:10:56
【河北省石家庄地区2022-2023学年八年级上学期期末考试数学试题(原卷版)

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一、选择题

1. 下列图形是中心对称图形的是(  )

A. B. 

C. D. 

2. 在实数-0.1010010001,,,,,0中,无理数有(

A. 4B. 3C. 2D. 1

3. 如图,关于O成中心对称,下列结论中不成立的是(  )

A. B. 

C. D. 

4. 如图所示,在中,的垂直平分线交于点E,若,则BE两点间的距离是(

A. B. C. D. 

5. 下列计算正确的是(  )

A±4B. ±3C. D. =﹣3

6. 十一黄金周,几名同学乘坐一辆客车前去“方特欢乐世界”游玩,客车的车费为180元,出发时,又增加了两名同学,结果每个同学比原来少分摊了3元车费,若设实际参加游览的学生共有人,则所列方程为(

A. B. C. D. 

7. 下列计算或化简正确的是(

A229B. 

C. D. 

8. 实数a,b表示的点在数轴上的位置如图,则将化简的结果是(

A. 4B. 2aC. 2bD. 

9已知,则M等于(

A. B. C. D. 

10. 用尺规作一个角的角平分线,下列作法中错误的是(

A. B. 

C. D. 

11. 若关于x的分式方程有正整数解,则整数m的值是(

A. 3B. 5C. 35D. 34

12. 如图,在中,的平分线于点D,如果垂直平分,那么

A. B. C. D. 

二、填空题

13. 用反证方法证明“在中,,则必为锐角”第一步是假设______

14. 要使式子有意义,则的取值范围是__________

15. 已知两条线段的长为,当第三条线段的长为_________时,这三条线段能组成一个直角三角形.

16. 如图,有一块田地形状和尺寸如图所示,则它的面积为_________

17. 已知,那么a,b,c的大小关系是_______

18. 如图所示,已知BE⊥AD,CF⊥AD,垂足分别为E,F,则在下列条件中选择一组,可以判定 R t△ABE≌ R t△DCF的是____________(填入序号)

①AB=DC,∠B=∠C;②AB=DC,AB∥CD;③AB=DC,BE=CF;④AB=DF,BE=CF;

19. 如图,矩形内三个相邻的正方形面积分别为4,32,则图中阴影部分的面积为_______

20. 如图所示,第个图案是由黑白两种颜色的六边形地面砖组成的,第个,第个图案可以看成是由第个图案经过平移而得,那么第个图案中白色六边形地面砖的数量为__________(代数式需要简化);

三、解答题(本大题共5个小题,解答应写出相应的文字说明、证明过程和演算步骤,将答案写在答题纸上)

21. 计算.

(1)

(2)

22. 斑马线前车让人,不仅体现着对生命的尊重,也直接反映着城市的文明程度.如图,某路口的斑马线路段A-B-C横穿双向行驶车道,其中ABBC12米,在绿灯亮时,晓雯共有9秒通过AC,其中通过BC段的速度是通过AB段速度的2倍,求晓雯通过AB段时的速度.

23. 如图所示,将大写字母A绕它上方的顶点按逆时针方向旋转,作出旋转后的图案,同时作出字母A向左平移5个单位的图案.

24. 如图,在ABC中,∠ACB=90°,CDAB于点D,AC+BC=+=2

(1)ABC的面积;

(2)CD的长.

25. 如图,是等边三角形,过点的外角平分线于点,连接,过点,交的延长线于点

通过网盘分享的文件:试卷1

链接: https://pan.baidu.com/s/1982iMYRRt5d5rlVaKpTarQ?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000494s ] mysql:host=127.0.0.1;port=3306;dbname=nowww460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000862s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000299s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000308s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000202s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000689s ]
  8. SELECT * FROM `article` WHERE `id` = 476568 LIMIT 1 [ RunTime:0.000446s ]
  9. UPDATE `article` SET `lasttime` = 1772003389 WHERE `id` = 476568 [ RunTime:0.004036s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000231s ]
  11. SELECT * FROM `article` WHERE `id` < 476568 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000439s ]
  12. SELECT * FROM `article` WHERE `id` > 476568 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000466s ]
  13. SELECT * FROM `article` WHERE `id` < 476568 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005622s ]
  14. SELECT * FROM `article` WHERE `id` < 476568 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001085s ]
  15. SELECT * FROM `article` WHERE `id` < 476568 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002206s ]
0.093575s