2020-2021学年四川省成都市龙泉驿区八年级(下)期末数学试卷

22222222222222学年四省成都市泉驿区八级（下）末数学试卷一选题本题10个小，小3，30分每题有个项其只一符合目要，案在题上A

BC

DA2y5B+3+3x5yx2yAa+b1bC4

BDx+9345A

B

C

D

aAa0

B0

C0D20

A1

B2

C3

DABCneq\o\ac(△,A)eq\o\ac(△,)'B'C2BA1+n

B1

C

Dn

122222122222A2

0B2C5eq\o\ac(△,Rt)OB

eq\o\ac(△,Rt)AOBA

B

C

D0eq\o\ac(△,Rt)ABCCDD②2+B90CD④BCBDA1B3二填题本题个小题每题4分共分，案在题上114x7ACCAOB3ABCD三解题本题个题，54分，解过写答卡）1abab+4

2

1

2

xADEGDBACAD10AE9FGCDDCFAGFG1.51CDAHB45DHDEFGDACAHBCH15AHDEFG

AODAOD1ABCDMAMDABM2MBCDACBCDME458

DE四填题本题个小题每题4分共分，案在题上a+bx

+1xxABCDADBC21eq\o\ac(△,S)eq\o\ac(△,)eq\o\ac(△,S)EC重EEFBCDF

五解题共3个小题共分）OABCAO48EFOCA'OF

ABCDEDECDEAE1202PAE

AP32APBCFBFFCeq\o\ac(△,Rt)eq\o\ac(△,Rt)ADE

CE2ABCD90

BCACCD3A902BDCD3ABCDADCEFG

BEBFBE

2222222222学年四省成都市泉驿区八级（下）末数学试卷参考答案一选题本题10个小，小3，30分每题有个项其只一符合目要，案在题上AD5D6B7D9C二填题本题个小题每题4分共分，案在题上11x+22x26三解题本题个题，54分，解过写答卡）1abab+424ab+4bb2

①x②xx1

2

xx14x2+6x5x40x5

2

x

ADEGDBACAD10AE9FGABCEGBCAEG10AEAB12EG

EFADADAEAB

FGEF

CDDCFAGFG1.51CDAHB45DHH45ABHABCHBHxGFEEBA

x1515AB15DEFGDACAHBCH15AHDEFG

DEFHAHDGMHxDGADGAM10ADGABCADG

x66361ABCDMAMDABMMCD2MBCDACBCDME458

DEBAMBAM++180AMD+DMC+AMB180AMD

2222BAMDMCABM2m8

BMMC4

BABDMB180DMBDME+EMCBDMDBMMCE6BDADBD

EC2eq\o\ac(△,Rt)ADEAEDEDE四填题本题个小题每题4分共分，案在题上22223x161五解题共3个小题共分）OABCAO48EFOCA'OFFDD

+AEF+BAC90FDEAOABDE3ADADOFOFABCDEDECDEAE1202PAE

AP32APBCFBFFCDADC90

DEDC20DEDAADE+90+202

yPBBCD90+2AFBCFPFCPBAF2yDCDEDEC290DECy901+2+3x+9090+90xy2x+DAE45eq\o\ac(△,Rt)

3DEPDKCFPCB1+90223424DKCABDC2FAF

CKDCDEDKEKCEeq\o\ac(△,Rt)eq\o\ac(△,Rt)ADE

CE2ABCD90CD

3A902BDCD3ABCDADCEFGBEBFBE

ABCABC

AB2CD+2BC

3ABCA2BDADE

ACBDEABCDBAD180+ADECDEABCDBADBCDACBEADBBAD90ACE2AC

ACCD+23

ACEF2CECF

CE4CFFBIFCEIEIEBCLIIMDA

1211221111212112211112211111122BFI