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【330251】2018-2019学年湖南省娄底市新化县八年级下学期期末考试数学试题答案

时间:2025-02-08 16:55:47 作者: 字数:2042字

 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 八年级数学参考答案

一、选择题(本大题共12小题,每小题3分,满分36分)

题号

1

2

3

4

5

6

7

8

9

10

11

12

答案

D

B

C

D

A

B

D

B

B

C

A

C

二、填空题(本大题共6小题,每题3分,满分18)

13.0-4.

14. <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

15.32

16.1

17.AB=BC(答案不唯一)

18. <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

. 解答题:( 本大题共2小题,每题6分,满分12)

19.解:A=142°B=38°D=38°


20. AB= <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

. 解答题:( 本大题共2小题,每题8分,满分16)

21.解:(1)学校、汽车站的坐标分别为(13),(2.-1);

(2)他路上经过的地方有:商店,公园,汽车站,水果店,学校,娱乐城,邮局



22.解:1)图略;

260

380%

.解答题:( 本大题共2小题,每题9分,满分18)

23.解:(1 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

2)当 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,货款150

 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 时,货款为425

24

六、综合与探究(本大题共2小题,每题10分,满分20)

25.解:

(1)M的坐标为-20

(2)直线MN的表达式为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

(3)3

 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>  <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

26.解:1)因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,又因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,又因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 为平行四边形,故 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>

2)四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 是菱形。因为在 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 中, <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 的中点,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 为平行四边形,因为 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 的中点,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,故四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 是菱形。

3)当 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 时,四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 是正方形。因为四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 为平行四边形,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,因为四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 是菱形,菱形的对角线互相垂直,并且每一条对角线平分一组对角,所以 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,则 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> ,所以四边形 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> 是正方形。

 <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/208/" title="学期" class="c1" target="_blank">学期</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a>