2021-2022學(xué)年廣東省深圳市龍崗區(qū)智民實(shí)驗(yàn)學(xué)校八年級(jí)(上)第一次月考數(shù)學(xué)試卷

學(xué)年廣省深圳市崗區(qū)智民驗(yàn)學(xué)校八級(jí)第一學(xué)期第一次月數(shù)學(xué)試卷一選題每分共分A5

B2

3.14C3D4A24B345456DA11

B1C

2

D32

A

B

C

DABCAB12ACABCA

Bx

C216D96A2012C112

B10D10216/A12/A25

B

C40

D50A1

B0C

D10AB

A12B

D

10ABCAB6DA7B6CD5二填題每分共分1112

27

13514a2

1+115eq\o\ac(△,Rt)ABCACBAC6QADPC+三解題共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

參考答案一選題每分共分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二填題每分共分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

三解題共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

四邊形ABCD四邊形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