2020-2021學年四川省成都市龍泉驛區(qū)八年級(下)期末數(shù)學試卷

22222222222222學年四省成都市泉驛區(qū)八級（下）末數(shù)學試卷一選題本題10個小，小3，30分每題有個項其只一符合目要，案在題上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+B90CD④BCBDA1B3二填題本題個小題每題4分共分，案在題上114x7ACCAOB3ABCD三解題本題個題，54分，解過寫答卡）1abab+4

2

1

2

xADEGDBACAD10AE9FGCDDCFAGFG1.51CDAHB45DHDEFGDACAHBCH15AHDEFG

AODAOD1ABCDMAMDABM2MBCDACBCDME458

DE四填題本題個小題每題4分共分，案在題上a+bx

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

五解題共3個小題共分）OABCAO48EFOCA'OF

ABCDEDECDEAE1202PAE

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

CE2ABCD90

BCACCD3A902BDCD3ABCDADCEFG

BEBFBE

2222222222學年四省成都市泉驛區(qū)八級（下）末數(shù)學試卷參考答案一選題本題10個小，小3，30分每題有個項其只一符合目要，案在題上AD5D6B7D9C二填題本題個小題每題4分共分，案在題上11x+22x26三解題本題個題，54分，解過寫答卡）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四填題本題個小題每題4分共分，案在題上22223x161五解題共3個小題共分）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