2021-2022学年内蒙古鄂尔多斯市部分中学八年级(上)第一次月考数学试卷

学年内古鄂尔多市部分中八年级第学期第一次月考数学卷一选题10小，小3分，30分A

BC

DA1cm4cmC511

Bcm20D141630720A6B7CD9CA810ABCeq\o\ac(△,S)BCOA11B243465D10ABC12A

B

C

DD90BDBCADCABDBA④CBADABABCBAD

阴影阴影A1

B2

C3

DABCDEFAD3A9BCD18MPNHMQNRMQNQMHA3B4CD6AOCABCD10DFACBDCDDDEEDFBAF①CDE②AB+AE③④ABDBDE

A1

B2

C3

D二填题（×6＝18分11

①③

+13304514ADB28ODB15BDABCBCD21BC16ABCAABACCEBDE8

三简答：17ADAEB50C1218C90DEADCABCDCDEBF191

2

n

3

420ABACA1DABACC2BACBDC21FBABCDCED22FCFBCDCACE1ED2FC23

U20BQABAABBMBNBQ2ACMBMN241DABCADCDCB2DABCADCDAB2511ABCABADADMDMADBMADCMDBABMAM2ADABCEACFABCDADEEDCEDECDAD

参考答案一选题10小，小3分，30分A

BC

DABCDDA1cm4cmC511

Bcm20D141630A4B13+1220C5+511D14+1630720A6B7CD9

+360nn1801080nCCA810ABCeq\o\ac(△,S)BCOA11B243465D1086ODACABOFOEOFODAB•ODAB8126CABC12A

B

C

DxxC3

CFBCFBEFBABC13xx3x+3x30Cx90D90BDBCADCABDBA④CBADABABCBADA1

B2

C3

DCDAB①BDABCBAD②ADHL③BAD④BADDABCDEFAD3A9BCD18S3cm2

BDEABDABDCFBEFBBDEABDBDEABBDEABDABDCFBEFBBDEABDBDEAB632eq\o\ac(△,)

EADS

BDE6cm22eq\o\ac(△,)32eq\o\ac(△,S)Deq\o\ac(△,S)

26SMPNHMQNRMQNQMHA3B4CD6QH59MQPM90RHMMQPASAPQQH

MQHQ4AOCABCDMCONCONCBOC10DFACBDCDDDEEDFBAF①CDE②AB+AE③④ABDBDE

A1

B2

C3

DDEDFeq\o\ac(△,Rt)CDEeq\o\ac(△,Rt)eq\o\ac(△,)eq\o\ac(△,Rt)eq\o\ac(△,Rt)AAF②DBFDCEAC③9090BADE④CAFDEACDFDEDFeq\o\ac(△,Rt)CDEeq\o\ac(△,Rt)BDFeq\o\ac(△,Rt)CDEeq\o\ac(△,Rt)eq\o\ac(△,)①AFeq\o\ac(△,Rt)ADEeq\o\ac(△,Rt)ADFeq\o\ac(△,Rt)eq\o\ac(△,Rt)ADFAF+AFAB+AE②eq\o\ac(△,Rt)CDEeq\o\ac(△,Rt)BDFDCEBCDBAC③DEAC

DEA90BACABDBDE④3C二填题（3×61811

①③①312

360+6018060+120133045

DMCAMF+ACBMCD90D60DMCDMCA451A+45757514ADB28ODB82SASABEBABEACDBCODBC2882

8215BDABCBCD21BC9BDADCDBCDBCADBCD21BDBC12916ABCAABACCEBDE8

CEABDACFEFCFCFCEBAFABD+90CDE90ABDBDBECBACBACACFABDASA

BDCBEBDBECBEFBECBECECCFBDBD4三简答：17ADAEB50C12AEBAC

EACADC21ABCB5080BAC508050EACBACADC9090102DAC10DAEEAC2515AED907518C90DEADCABCDCDEBF360ADCABCDE+FBC90ADEA+ABC180ADCBFABCDCFADEEDCABF

ADE+90AED+90ADEAEDDEBF191

2n3n

nn33

42n3

4n92n3nn3nn3

4n1254

20ABACA1DABACC2BAC+180的D2+BDC1801D2+BDC180DDMMACNAND90BAC+MDNeq\o\ac(△,Rt)DMBeq\o\ac(△,Rt)

eq\o\ac(△,Rt)DMBeq\o\ac(△,Rt)DNCHLMDBNDCMDNBAC+180BAC18021FBABCDCEDAEBCDABCDBCBFBFCFAEBAAS22FCFBCDCACE1ED2FC

ABC2CH1ACE+ACD+ACDBCAABCSASED2

C

CGCH

GHABCBCHDEDCH

CHFC23U20BQABAABBMBNBQ2ACMBMNBMtt90BMAMtACBMBNtBM23tcmACMBMAMAMAB203ttBM2t4cmBMBNBMAM202ttBNt5AC815

241DABCADCDCB2DABCADCDABCDBAODCODCODOC2DDEDFACAFDF1AODCODADABBCDADBCDBADOODCAODODCAODCODAODCODBDAC

2DDEDFACAEDEDFBDBDeq\o\ac(△,Rt)eq\o\ac(△,Rt)BDFBFEDFDADeq\o\ac(△,Rt)eq\o\ac(△,Rt)CDFCFCFAB2511ABCABADADMDMADBMADCABMAM

AD2ADABCEACFABCDADEEDCEDECDAD

1ADMDMADBMADCMDBACBM5ABBMAM+BM2ADTDTADBTADCTDBACTB