2021-2022学年广东省深圳市龙岗区智民实验学校八年级(上)第一次月考数学试卷

学年广省深圳市岗区智民验学校八级第一学期第一次月数学试卷一选题每分共分A5

B2

3.14C3D4A24B345456DA11

B1C

2

D32

A

B

C

DABCAB12ACABCA

Bx

C216D96A2012C112

B10D10216/A12/A25

B

C40

D50A1

B0C

D10AB

A12B

D

10ABCAB6DA7B6CD5二填题每分共分1112

27

13514a2

1+115eq\o\ac(△,Rt)ABCACBAC6QADPC+三解题共55分）161

122334122334521324324

17523+6918DDFAB8cm10EC19ABCDBC12cmDC13cm20AAD221eq\o\ac(△,)eq\o\ac(△,)Aeq\o\ac(△,)AOAOA

2

OA12

2

3

OA12

2

4

1

101101102OA3S2+2S

+S2

22OMNMON90OBOCOBCN1BM2MNA+32AEBFOMABFAP

参考答案一选题每分共分A5

2+B2

3.14C3D4①②③πD

A24B345456DA2

4B2

52C62D72

9A11

B1C

2

D311A1B

2

C3DA

B

C

DA3

B

CD

ABCAB12ACABCABCD96122

+16

AC221216D

xA2012C112

B10D1021341442123x102

D16/A12/A25

B

C40

D50AABBCBCAC162AB24C

A1

B0C

D

0+10

4a+10aC10AB

A12B

D

ADBCDACEADAADD，BEADDBD10BD5eq\o\ac(△,Rt)ABDADAD

C

10ABCAB6DA7B6CD5

AAFFBFCFBCEBDAD4DFxABCCFBCEBDAD4DFx2

BFAD162xxDF0.5BCACCFCD+DFBF+DFBDDF2D二填题每分共分11

eq\o\ac(△,S)eq\o\ac(△,S)

12

275

135163422

221614a2

1+1aaba

1a+1a1ab

2+1115eq\o\ac(△,Rt)ABCACBAC6QADPC+CMABABADPPQADBACPM+CMABCM•BCCMPC+PQCABABMADPACQ

△△PQPM+PQ90ABCMAC

三解题共55分16

12

4

2124

5

442

5

17523+69xx+695

5xx+69x+69818DDFAB8cm10ECADDEFECECxcmDExADAFAFEDEEFADBCADcmcmeq\o\ac(△,Rt)ABF+2

282

2

FC104eq\o\ac(△,Rt)EFCFC2+EC242

+282

x

16+

1648xEC319ABCDBC12cmDC13cm

四边形ABCD四边形ABCDBDBDA903cmABBDBD+BC2

169CD+BD536cm36cm

20AAD21.6

1223345211223345213243101100.8eq\o\ac(△,Rt)OEFmEF+21eq\o\ac(△,)eq\o\ac(△,)Aeq\o\ac(△,)AOAOA

2

OA12

2

3

OA12

2

4

12OA3S2+2S++S22n

1210nnn1210nnn1012313S++++S2+++1

OAn

22

OA32+2S

++++++22OMNMON90OBOCOBCN1BM2MNA+32AEBFOMBF90OMCNBM2ACANC90+2

AN+BM

EANPAB2AE2

BF2

2

AE2+BF

AP2

AEBF1OBMON90COMCONBOMBM2OAOMMONONMOMN180135ONCONM13545