2021-2022学年广东省中山市八年级(上)期中数学试卷

学年广东省中山八年级第一期期中数试卷注意事项：1答题，考生务必试题卷、题卡规定置填写本人准考证号、姓名等信息．考生要认真核答题卡上贴的条形的“准考证号、姓名”与考生本人考证号、姓名是否一．2选择每小题选出案后，用2B铅笔把答题卡上对应题目的答案标号涂黑，如改动，用橡皮干净后，选涂其他案标号．非选择题答案用毫黑色墨水签字笔在答题卡相应位置写作答，试题卷上答题无效．3作图先使用2B铅笔画出，确定后必须用0.5毫米黑墨水签字笔黑．一单选题共10题.A

B

C

D49cmA13BCDABCABCABCA

B

C

D13cm3A7B3C7cm38cmA72

B60

C58

D50ABCABDACcmAEDE

A2B3C4cmDABCABCADAD3BCA6B9CDABCDEFAABDECFBDEBCCDEACDFBEDABDEACDFEABCDEACBCD18ABDA121518D102012PB3AA2cmAPQPQA2.5

B3

C3.5

D二填题共7小，每题分满28分11y12

13A10040ACAB14OACDEAOD154216eq\o\ac(△,，)ABCBCADDBBACADC

17ADDEBFACEDFABF2BF①DEDF③④ACBF三解题一（3个小，小分满分1819DABCDFFEAD

11111120BAC70C1ABCBD2四解题二（3个小，小分满分21B4C41ABCeq\o\ac(△,A)eq\o\ac(△,)CABC2yPAPB2290ADBACDDEDEADBCDDB23ABCACBACFDDF1CEF

2五解题三（2个小，小分，分20分24112ANAOM32ANMCBMCEF25ABACDDCADDEE12

参考答案一单选题共10题每题3分满分A

B

C

DABCD49cmA13BCD94cm9+4cm5cmcmBABCABCABCA

B

C

DABC+BCA+B180ABCBC+B+290

13cm3A7B3C7cm38cm373+33cm5cmcmA72

B60

C58

D50acDABCABDACcmAEDEA2B3C4cmDDEEC+ACBABCDEABDEEC

+ECABCABCADAD3BCA6B9CDB30BAD90C30CDADcmeq\o\ac(△,Rt)ABDBD2BCBCADBD6cm+ADBADB60ADB+6030DCADBDDC6+39ABCDEFAABDECFBDEBCCDEACDFBEDABDEACDFEECFDEABCBACDFBCABSSS

C，ACDFBEeq\o\ac(△,)ABCDE90ABACDFHLeq\o\ac(△,Rt)eq\o\ac(△,)ABCRtDEFCABCDEACBCD18ABDA121518DDADC3DAAC18+1812ABBD+DC+BC12102012PB3AA2cmAPQPQA2.5

B3

C3.5

DxcmAP3xcmAPQPQ

AQ203xAB12B3cmAQA2C3x2x203xx4D二填题共7小，每题分满28分11y32y3212n180144n1013A10040ACAB5ABC10040C1004040C5

14OACDEAODOCAADOBCOAODBOCOASASASAAASAODOAOBODOCBOCADOAASODOCADOBCOODOCABADOBCO154212+DEC1+90

9016DBCDBBAC10252ACADDB102BADADCADDBBBADBBADBAC102

+DDEBFACEDFABF2BF①DEDF③④ACBF①②③④

DBC②DEDFCE①CBCABCCBFCABCBDADBC②③DEDFBF①2BF④①③④三解题一（3个小，小分满分18n2n23606

19DABCDFFEADAECFADECFEABAADEFCFEADECFEAASAD

20BAC70C1ABCBD2BACABD

ABC251BD270C60ABCC50

ABC25

1111111111111BAC+7095四解题二（3个小，小分满分21B4C41ABCeq\o\ac(△,A)eq\o\ac(△,)CABC2yPAPB2AB1eq\o\ac(△,A)eq\o\ac(△,)B32P2290ADBACDDEDEADBCDDB

AEDBEDBADB30DBCDDBDEAEDBED90ADEBDEDEDEAEDBEDADBDDAEBADCADBADCADBADBDBAD+BBBAD30CDADBDCD．23ABCACBACFDDF1CEF21ACB90F

FCEACF45CEF2ADF+CFE+DFC90DFE1ACBABFABACFFCBFCE45AFADFCEFCEFSAS2DFE1ADFCEFDFFEDFECFEAFD+DFC+DFCAFCAFC9090DFE五解题三（2个小，小分，分20分24112ANAOM32ANMCBMCEF

MCBSASBMMBCCAN+CANBCN3CF1BMCBNCNCBACM60+MCNBCMACNMCBMCBBM2MCBMBCMBC+BCN3CEFMCBCAECMFMCF180ACEMCFMCF

ACEMCFASAMCFCEF25ABACDDCADDEE12