八年级下册期末数学试题附答案

数学如何不经常的练习以及活动大脑思维的话，那学习起来会非常的困难，下面是我给大家带来的 八年级 下册期末数学试题，希望能够帮助到大家!

八年级下册期末数学试题(附答案)

(满分：150分，时间：120分钟)

一、选择题(每小题3分，共24分)每题有且只有一个答案正确，请把你认为正确的答案前面的字母填入答题卡相应的空格内.

1.不等式 的解集是( )

A 　B C D

初二年级下册数学第三单元试题及答案

以下是 初二频道 为大家提供的《初二年级下册数学第三单元试题及答案》，供大家参考！

一、选择题

1. 如图，在10×6的网格中，每个小方格的边长都是1个单位，将△ABC平移到△DEF的

位置，下面正确的平移步骤是(　　)

A.先把△ABC向左平移5个单位，再向下平移2个单位

B.先把△ABC向右平移5个单位，再向下平移2个单位

C.先把△ABC向左平移5个单位，再向上平移2个单位

D.先把△ABC向右平移5个单位，再向上平移2个单位

2.下列图形中，既是轴对称图形，又是中心对称图形的是

A B C D

3. 如图，将△AOB绕点O按逆时针方向旋转45°后得到△A′OB′，

若∠AOB=15°，则∠AOB′的度数是(　　)

A.25° B.30° C.35° D.40°

4. 将四边形ABCD先向左平移3个单位，再向上平移2个单位，

那么点A的对应点A′的坐标是(　　)

A.(6,1) B.(0,1) C.(0，-3) D.(6，-3)

5. P是正△ABC内的一点，若将△P1BA,则∠PBP1的度数

是( )

A.45° B.60° C.90° D.120°

二、填空题

1.如图所示，△ABC沿BC方向平移到△DEF的位置，若BE=2㎝，

则CF= .

2.如图，在等边△ABC中，AB=6,D是BC的中点，将△ABD绕点A旋转后得

到△ACE,那么线段DE的长度为 .

3.如图，已知正方形ABCD的边长为3，E为CD边上的一点，DE=1.以点A为中心，把

△ADE顺时针旋转90°，得△ABE′，连接EE′，则EE′的长等于__________.

4.如图，在△ABC中，AB=BC，将△ABC绕点B顺时针旋转α，得到

△A1BC1，A1B交AC于点E，A1C1分别交AC，BC于点D，F，下列结论：

①∠CDF=α;②A1E=CF;③DF=FC;④AD=CE;⑤A1F=CE.其中正

确的是________(写出正确结论的序号).

三、解答题

1. 如图6-2-20，将一个钝角△ABC(其中∠ABC=120°)绕点B顺

时针旋转得△A1BC1，使得C点落在AB的延长线上的点C1处，

连接AA1.

(1)写出旋转角的度数;(2)求证：∠A1AC=∠C1.

2.如图，在两个重叠的直角三角形中，将其中的一个直角三角形沿着BC方向平移BE距离得到此图形，其中AB=8，BE=5，DH=3.求四边形DHCF的面积.

3.将两块大小相同的含30°角的直角三角板(∠BAC=∠B′A′C=30°)按图6-2-21(1)的方式放置，固定三角板A′B′C，然后将三角板ABC绕直角顶点C顺时针方向旋转(旋转角小于90°)至图 (2)的位置，AB与A′C交于点E，AC与A′B′交于点F，AB与A′B′相交于点O.

(1)求证：△BCE≌△B′CF;

(2)当旋转角等于30°时，AB与A′B′垂直吗?请说明理由.

八年级上册数学试卷题

自信应该在心中，做八年级数学 单元测试 题目应知难而进。下面我给大家分享一些八年级数学上册第12章全等三角形单元测试题，大家快来跟我一起看看吧。

八年级数学上册第12章全等三角形单元试题

(时间：120分钟　　满分：120分)

一、选择题(每小题3分，共30分)

1.如图，△ABD≌△CDB，下面四个结论中，不正确的是(　　)

A.△ABD和△CDB的面积相等 B.△ABD和△CDB的周长 相等

C.∠A+∠ABD=∠C+∠CBD D.AD∥BC，且AD=BC

,第1题图)　　 ,第2题图)

,第3题图)　　 ,第4题图)

2.如图，小强利用全等三角形的知识测量池塘两端M，N的距离，如果△PQO≌△NMO，则只需测出其长度的线段是(　　)

A.PO B.PQ C.MO D.MQ

3.如图，BE⊥AC于点D，且AD=CD，BD=ED，则∠ABC=54°，则∠E=(　　)

A.25° B.27° C.30° D.45°

4.(2014•南昌)如图，AB∥DE，AC∥DF，AC=DF，下列条件中不能判断△ABC≌△DEF的是(　　)

A.AB=DE B.∠B=∠E C.EF=BC D.E F∥BC

5.如图，∠1=∠2，∠3=∠4， 则下面结论中错误的是(　　)

A.△ADC≌△BCD B.△ABD≌△BAC C.△ABO≌△COD D.△AOD≌△BOC

,第5题图)　　　　 ,第6题图)　　　　 ,第7题图)

6.如图，在△ABC中，AB=AC，点E，F是中线AD上的两点，则图中可证明为全等三角形的有(　　)

A.3对 B.4对 C.5对 D.6对

7.如图，在△ABC中，∠ACB=90°，沿CD折叠△CBD，使点B恰好落在AC边上的点E处，若∠A=22°，则∠BDC等于(　　)

A.44° B.60° C.67° D.77°

8.如图，DE⊥BC于点E，且BE=CE，AB+AC=15，则△ABD的周长为(　　)

A.15 B.20 C.25 D.30

9.如图，AB⊥B C，BE⊥AC，∠1=∠2，AD=AB，则(　　)

A.∠1=∠EFD B.BE=EC C.BF-DF=CD D.FD∥BC

,第8题图)　　　　　 ,第9题图)　　　　　 ,第10题图)

10.如图，在△ABC中，AD是∠BAC的平分线，DE⊥AC于E，DF⊥AB于F，且FB=CE，则下列结论：①DE=DF，②AE=AF，③BD=CD，④AD⊥BC.其中正确的个数有(　　)

A.1个 B.2个 C.3个 D.4个

二、填空题(每小题3分，共24分)

1 1.在△ABC中，AB=8，AC=6，则BC边上的中线AD的取值范围是________.

12.若△ABC≌△EFG，且∠B=60°，∠FGE-∠E=56°，则∠A=________度.

13.如图，AB=DB，∠ABD=∠CBE，请你添加一个适当的条件______________，使△ABC≌△DBE.(只需添加一个即可)

14.如图，AB=AC，AD=AE，∠BAC=∠DAE，∠1=25°，∠2=30°，则∠3=________.

,第13题图) ,第14题图) ,第15题图) ,第16题图) ,第17题图)

15. 如图，在Rt△ABC中，∠ACB=90°，BC=2 cm，CD⊥AB，在AC上取一点E，使EC=BC，过点E作EF⊥AC交CD的延长线于点F，若EF=5 cm，则AE=________ cm.

16.如图，在Rt△ABC中，∠C=90°，AC=10 cm， BC=5 cm，一条线段PQ=AB，P，Q两点分别在线段AC和AC的垂线AX上移动，则当AP=________时，才能使△ABC和△APQ全等.

17.如图，已知△ABC中，∠ABC，∠ACB的角平分线交于点O，连接AO并延长交BC于D，OH⊥BC于H，若∠BAC=60°，OH=5 cm，则∠BAD=________，点 O到AB的距离为________ cm.

18.已知点A，B的坐标分别为(2，0)，(2，4)，以A，B，P为顶点的三角形与△ABO全等，写出一个符合条件的点P的坐标：____________________________.

三、解答题(共66分)

19.(6分)如图，在△ABC和△DCE中，AB∥DC，AB=DC，BC=CE，且点B，C，E在一条直线上.求证：∠A=∠D.

20.(8分)如图，点B在射线AE上，∠CAE=∠DAE，∠CBE=∠DBE.求证：AC=AD.

21.(10分)如图，E是∠AOB的平分线上一点，EC⊥OA，ED⊥OB，垂足为C，D，连接CD交OE于F.求证：(1)OC=OD;(2)DF=CF.

22.(10分)如图，在Rt△ABC中，∠ACB=90°，点D，F分别在AB，AC上，CF=CB，连接CD，将线段CD绕点C按顺时针方向旋转90°后得CE，连接EF.

(1)求证：△BCD≌△FCE;

(2)若EF∥CD，求∠BD C的度数.

23.(10分)如图，AB=DC，AD=BC，DE=BF，求证：BE=DF.

24.(10分)如图，已知：∠B=∠C=90°，M是BC的中点，DM平分∠ADC.

求证：(1)AM平分∠DAB;(2)AD=AB+CD.

25.(12分)如图，在∠AOB的两边OA，OB上分别取OM=ON，∠OME=∠OND，DN和EM相交于点C，CD=CE.求证：点C在∠AO B的平分线上.

八年级数学上册第12章全等三角形单元测试题参考答案

1.C　2.B　3.B　4.C　5.C　6.D　7.C　8.A　9.D　10.D　11.1

18.(0，4)或(4，0)或(4 ，4)(答其中一个即可)

19.∵AB∥DC，∴∠B=∠DCE.又∵AB=DC，BC=CE ，∴△ABC≌△DCE(SAS)，∴∠A=∠D

20.∵∠CBE=∠DBE，∴180°-∠CBE=180°-∠DBE，即∠ABC=∠ABD，在△ABC和△ABD中， ∠CAE=∠DAE，AB=AB，∠ABC=∠ABD，∴△ABC≌△ABD(ASA)，∴AC=AD

21.(1)∵EC⊥OA，ED⊥OB，∴∠OCE=∠ODE=90°，在△OCE和△ODE中，∠ECO=∠EDO，∠COE=∠DOE，OE=OE，∴△OCE≌△ODE(AAS)，∴OC=OD　(2)在△COF和△DOF中，OC=OD，∠COE=∠DOE，OF=OF，∴△COF≌△DOF(SAS)，∴DF=CF

22.(1)∵∠ACB=90°，∠DCE=90°，∴∠ACB-∠ACD=∠DCE-∠ACD，即∠BCD=∠FCE，在△BCD和△FCE中，BC=CF，∠BCD=∠FCE，DC=CE，∴△BCD≌△FCE(SAS)　(2)∵EF∥CD，∴∠E=∠D CE=90°，∴∠BDC=∠E=90°

23.连接BD.∵AD=BC，AB=CD，BD=BD，∴△ABD≌△CDB(SSS) ，∴∠ADB=∠DBC，∴180°-∠ADB=180°-∠DBC，∴∠BDE=∠DBF，在△BDE和△DBF中，DE=BF，∠BDE=∠DBF，DB=BD，∴△BDE≌△DBF(SAS)，∴BE=DF

24.(1)过M作MH⊥AD于H，∵DM平分∠ADC，MC⊥DC，MH⊥AD，∴CM=HM，又∵BM=CM，∴MH=BM，∵MH⊥AD，MB⊥AB，∴AM平分∠DAB　(2)∵∠CDM=∠HDM，∴∠CMD=∠HMD，又∵DC⊥MC，DH⊥MH，∴DC=DH，同理：AB=AH，∵AD=DH+AH，∴AD=AB+CD

25.在△MOE和△NOD中，∠OME=∠OND，OM=ON，∠MOE=∠NOD，∴△MOE≌△NOD(ASA)，∴OD=OE，∵CD=CE，OC=OC，∴△OCD≌△OCE(SSS)，∴∠DOC=∠EOC，即C在∠AOB的平分线上

八年级下册期末考试试卷

八年级的同学们要不断努力学习八年级英语才能丰富自己的英语知识，并且做好英语期末试卷的练习，才能在英语期末考试中取得理想成绩。以下是我给你推荐的八年级英语下册期末考试卷及参考答案，希望对你有帮助!

八年级英语下册期末考试卷

第一部分 英语基础知识运用(共三节，满分45分)

A、 词语释义(共10小题，每小题1分，满分10分)

选出与句中划线部分意义最接近的解释，并将其字母代号填入答题卷相应的空格内。

( )1.The boy ran out of his money,so he had to walk to the hotel.

A.ran away B.got out of C.lost D.used up

( )2.The girl is good at playing bascketball.

A.do well in B.did well in C.do good in D.does well in

( )3.After trying many times,we got successful in the end.

A.at present B.at first C.at last D.at least

( )4.All Chinese people raised money for the people in Yunnan.

A.collected B.handed in C.got D.sent

( )5. ---I’m going to tell you something important.

--- Go ahead.We are all ears.

A.We don’t want to listen. B.We have ears.

C.We don’t mind. D.We are listening to you.

( ) 6.The singer sang several songs for us before she left.

A. a few B. many C. a little D. five

( )7.The girl sat in the corner quietly .

A.in silence B.in silent C. silent D. angrily

( )8.His parents were angry with him just now.

A. annoyed B. surprised C. annoy D.pleased

( )9.Doing exercise every day can make you stay healthy.

A.live B.keep C.become D.is

( )10.You’d better return it.

A.give back it B. get back it C. give it back D. get it back

B、 选择题(共25小题，每小题1分，满分25分)

( ) 11. Could you give me__ _?

A . an advice B. some advice

C. any advice D. some piece of advice

( )12. I’m very ___ because my best friend didn’t invite me to come to his party.

A . popular B. happy C. late D . upset

( )13. They planted _____trees today.

A. thousands of B. thousands

C. two thousands D. thousand of

( )14. We’ll have a picnic if it ______rain tomorrow.

A. don’t B. doesn’t C. won’t D. isn’t

( )15. I couldn't find my dictionary _________.

A. somewhere B. anywhere C. nowhere D. everywhere

( )1 6. --- I have been to a water park.

--- ________ .

A. So have I B. Neither have I

C. So do I D. So am I

( )17. Where’s Lily? We are all here _______her.

A. except B. about C. beside D. with

( )18.——Mr. Li is ill in hospital. His daughter is looking after him.

—— .

I’m sorry to hear that B. Not at all

C. I’m afraid D. It doesn’t matter

( )19.Though his grandmother lives ______,she never feels________.

A.alone;alone B.lonely;lonely C.alone;lonely D.lonely;alone

( )20.Some volunteers from Beijing arrived in Shanghai _____ April 29 to work for the World Expo.

A. on B. at C. of D. to

( )21.This is an ________ book. I’m very ________ in it.

A. interesting, interested B. interested, interesting

C. interesting, interest D. interest, interesting

( )22. The more you read, ____ you will get.

A. the less B. the most C. the more D.the better

( )23.Could you please pass me the book? ________.

A. Yes, I could B. No, I couldn’t

C. Sure. Here you are D. No, that’s no problem

( )24.When we get on the bus, we should wait ________.

A. in a line B. with a line C. in line D. on line

( )25.Please turn _______ the light before you leave.

A. on B. off C. up D. down

( )26.While I ________, he said hello to me.

A. read B. was reading C. am reading D. readed

( )27.Every day this happens _______ me in the school library.

A. to B. in C. on D. with

( )28.Goldfish are very easy _______.

A. for taking care B. to take care

C. with taking care of D. to take care of

( )29.--Today he is very happy, isn’t he?

-- . He didn’t pass the exam.

A. Yes, he is B. Yes, he isn’t C. No, he is D. No, he isn’t

( )30.This bag ________ him 100 yuan last year.

A. cost B. spend C. took D. paid

( )31.---Do you like the city life or the country life?

---It’s hard to say. In the city there are _____interesting things, but in the country there is _____ pollution.

A. less; more B. more; less C. more; fewer D.many; much

( )32. 10 years ago， _____only one classroom building in our school.

And in 10 years， _____ five classroom buildings in our school.

A.there will be, there are B. there was, there will be

C. there will be; there was D.there had; there will have.

( )33.—Where is Bill? —He ________ Sydney with his father.

A. has gone to B. has been to

C. have gone to D. have been to

( ) 34. I think a dog is a good pet for _________ child.

A. a 6-year-old B. an 6-years-old

C. a 6-year old D. a 6 years-old

( )35.—Would you like some tea or coffee? —______ is OK.

A. Neither B. Either C. Both D. Any

第三节. 完形填空(共10小题，每小题1分，满分10分)

When Mr Black was young, he often played football, and he was good 36 it. But then he went and worked in a town and there was 37 football team for him there, so he stopped 38 . Then he began to get fat, so he thought, “I stopped playing football and I’ve got fat. What shall I do?” He thought about it for 39 days and he said to 40 , “I’ll play pingpong.” He had some 41 and he played for a few months. He met a nice girl at the club 42 day and they played a game of pingpong against 43 young man and young woman. Mr Black played very 44 , and he was very sad about this. “I never played 45 than this before,” he told the girl. “Oh,” she said, “you played pingpong before, didn’t you?”

( )36. A. at B. in C. for D. about

( )37. A. no B. an C. on D. a

( )38. A. play B. playing C. played D. to play

( )39. A. every B. much C. a little D. a few

( )40. A. himself B. herself C. themselves D. itself

( )41. A. games B. friend C. times D. lesson

( )42. A. every B. one C. each D. whole

( )43. A. the other B. others C. each other D. another

( )44. A. worse B. badly C. good D. well

( )45. A. badly B. well C. worse D. better

第二部分 . 阅读理解(共15小题，每小题2分，满分30分)

(A)

One day a rich man met Jack. He asked, “I hear you are very clever and nothing is difficult to you. Can you tell me why you are so clever?”

Jack answered with a smile, “Oh, I’m not clever. Instead, you are too silly(傻).” The rich man became angry.

Jack said, “Please don’t be angry. Now let me ask you a question. If you have a group of sheep(羊). I give you another group. Then how many groups of sheep do you have?”

“Two, of course. Anyone knows that I have two groups of sheep.” Jack laughed and said, “You’re wrong. Two groups of sheep together(一起) are still one group. That’s the easiest question in the world.”

根据短文内容，判断以下句子的正误。你认为正确的句子请在答题卷相应的空格内写T,错误的写F,(共5小题，每小题2分，满分10分)

( )46. Jack answered the rich man with a red face.

( )47. The rich man was happy to hear Jack’s words.

( )48. The rich man knows one and one is two.

( )49. The rich man answered Jack’s question correctly(正确地).

( )50. In maths, one and one is always two, but in life, sometimes one and one is still one.

(B)

We each have a memory(记忆力). That’s why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart, but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.

A good memory is a great help in learning a language. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and then he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages as easily as one because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language because the pupils have so little time for it, and they are busy with other subjects, too.

But your memory will become better and better when you do more and more exercises.

根据短文内容,选择正确答案，并将其字母代号填入答题卷相应空格内。 (共5小题，每小题2分，满分10分)

( )51、Some people can easily learn many things by heart because .

A.they always sleep very well B.they often eat good food

C.they read a lot of books D.they have very good memories

( )52、Everybody learns his mother language .

A.at the age of six B.when he is a small child

C.after he goes to school D.when he can read and write

( )53、Before a child can speak, he must .

A.read and write B.make sentences

C.hear and remember the sounds D.think hard

( )54、In school the pupils can’t learn a foreign language well because .

A.they have no good memories

B.they have no recorders

C.they have too much time for it

D.they are busy with other subjects

( )55、Your memory will become better and better .

A.if you have plenty of good food

B.if you do more and more exercises

C.if you do morning exercises every day

D.if you get up early

(C)

Mr Brown is one of my friends. He can run very fast and likes to show people how fast he can run.

One day, a thief(小偷)got into his house, took some of his things and ran out of the house fast. Mr Brown found it and ran after him, and shouted, “Hey! Don’t you know you can’t get away from me.”

But the thief ran much faster, Mr Brown got angry and ran faster, too. He was soon a few kilometers away from his house, he was running hard when he met me. “Why are you running so fast?” I asked. “I want to catch a thief,” said Mr Brown. “But where is the thief?” I asked. “Kilometers and kilometers behind,” said Mr Brown proudly, “He thought he could run faster than me, but you see he is wrong.”

根据短文内容,选择正确答案，并将其字母代号填入答题卷相应空格内。 (共5小题，每小题2分，满分10分)

( )56. Did the thief steal(偷)anything from Brown’s house?

A. Yes, he has. B. No, he wasn’t.

C. Yes, he did. D. No, he didn’t.

( )57. Who ran faster, Mr Brown or the thief?

A. No one. B. The writer. C. Mr Brown. D. The thief.

( )58. Did Mr Brown catch the thief?

A. Yes, he did. B. No, he didn’t.

C. Yes, but he let him go away. D. No, but his friend did.

( )59. What did Mr Brown do when he found the thief?

A. He ran after him. B. He was angry with him.

C. He caught him. D. He stayed far behind him.

( )60. What does the word “proudly” mean? It means __________.

A. 自豪地 B. 难过地 C. 兴奋地 D. 不慌不忙地

第三部分 写作 (共三节，满分25分)

1、 根据句意，用括号中所给词的适当形式填空，并将其单词写在答题卷相应的位置。(共8小题，每小题1分，满分8分)

61. She wants to be a _________ (science) when she grows up.

62.Teachers often encourage (we) to get over the difficulties in life.

63.Don’t fall (sleep) in class.

64.Can you tell me what your (decide) is?

65.Students should take part in some (organize) activities.

66.Talking loudly is in public place.( polite)

67.Would you mind not (smoke) here?

68.It’s hard for him to learn English (good).

2、 将下列句子中的汉语部分译成英语，注意使用适当的形式，并将所填单词写在答题卷相应的位置。(共7小题，每小题1分，满分7分)

69.I hope my drean can ( 实现 ) in the future.

70.If you want to make some money,you could get ( 一份兼职工作).

71.The girl is (一样高) her twin sister.

72.When did you get your (成绩单)?

73. ，what’s your hobby? (随便一提)

74. The of the men’s competition are very modest.(这两个获胜者)

75.When I came into our living room,my mother was

the books and magazines on shelf. (浏览)

第三节 书面表达(满分10分)

提示：以If I have a lot of money , I will do many things.为题写一篇英语作文。 要求：

1、词数不少于60个;语言流畅、书写规范、卷面整洁;

2、文中不得使用你的真实姓名、校名，否则以零分记;

3、书面表达必须写在答题卷上，如在本试卷上作答，一律不得分。

八年级英语下册期末考试卷答案

1—5DDCAD 6—10AAABC 11—15BDABB

16—20AAACA 21—25ACCCB 26—30BADDA

31—35CBAAB 36—40AABDA 41—45ABABC

46—50FFTFT 51—55DBCDB 56—60 ACBAA

61.scientist 62.us 63.asleep 64.decision

65.organized 66.impolite 67.smoking

68.well 69.come true 70.a part-time job 71. as tall as

72. report card 73.By the way 74.two winners

75. looking through

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