-河南省新乡市2020-2021学年七年级下学期期末数学试卷

学年河南省新乡七年级（下期末数学卷一选题每题3分，分下各题有个案，中有个正的A

BC

DA2B+C2+3Dx0AacabByCbaD+b0A①②

B②

C①④

D①④2+14A1B2CDA

B

C

D803040xy

ABCD①②③④A①②

B①③

C①②④

D①③④和13cmA6B7CD1210BCMNBCMNE2A2B7C2cm97cm或11二填题每题3分共分x1kk12xx

m13

14eq\o\ac(△,Rt)A300180DEC

15ACB90CMDPDPCDDPBP三解题本题8个小，分75分16

2

17

1①2②3①②418744819ABCDABE3DE21213040

111111122221211220xaxa+b442+21x12xxm21114BC2ABCCBAC3CC22CF3045112DEP①BCEF②BPD22MN3DABDEDF

234223086530122000

学年河南省新乡七年级（下期末数学卷参考答案试题解析一选题每题3分，分下各题有个案，中有个正的A

BC

D根BCDDA2B+C2+3Dx01ABBCDDCAacabBy

CbaD+b0BDc0acabaBxCbaD+baA①②

B②

C①④

D①④几①②90360③④120360①④D2+14A1B2CD1x+141x3

1x1CA

B

C

Dnnn+603605803040xyABCD80304060150yD①②

③④A①②

B①③

C①②④

D①③④解①②③④和13cmA6B7CD12分66cm13cm6+6cm1313C10BCMNBCMNE2A2B7C2cm97cm或11BEABCMNABCMNBE2

MNDEFCEBCBE97MNDEFCEBCBEcmCE11D二填题每题3分共分x1kk1xkx1kxxk1kk1112xx

m

x1xm3313

x+6y5①6+y56x+36y30xy5①x+②①6+36y③③②y1y1①x6x

14eq\o\ac(△,Rt)A300180DEC

30ACDAACD30CACD3015ACB90CMDPDPCDDPBP

BACBDBACDPDPBCD45BBACD

BPD+PBACB45CBCDCDCDB+22.5三解题本题8个小，分75分16

22y2x142+1642+16x4x7xx2①②x12x2x①42+11y3

17

1①2②

xx3①②4x分①42②x13①②44x1x4x1x187448x5x+8x44x3xx3319ABCDABE3DE2

1213040AEAE2BDE90ACBAED90AD23AE3+212AEADE7AE92ADEAEDBDEA4090DEBCACBAED20xaxa+b442+21x1

111122111122221211211111222122xxm2xx+1x1

2

2xm+1x

xx3++1m1021114BC2ABCCBAC3CC41ACBC2BCABCA3CA

11211222111eq\o\ac(△,A)eq\o\ac(△,)C2ABC3C1+33

2

22CF3045112DEP①BCEF

②BPD

10522MN3DABDEDF②245EFDACBEFD+ACB180EF②EFD90DEF

903060BPD+BAC1052eq\o\ac(△,AB)eq\o\ac(△,)CCAB60B