湖南省懷化市中學方縣2023-2024學年七年級數(shù)學第一學期期末綜合測試模擬試題含解析

2023-2024

2.0M?t,&{W/b?^êJs,fcWgfcjtbS

0^?&W,^?W#±?^o

3.

-,?&?(<<h?3#,&30#)

i.MièM4?nnrifêM()

A.6B.63C.46D.47

2.?4üWWiê^-|è4(M)X,5min

Js?-mW()*/ft.

A.120B.160C.180D.200

3.Wl?l=-a,()

A.?>0B.?<0C.<z>O^<z=OD.a<0^a=0

4.M,()

A.44“B.34“C.24“D.14-

5.51°14'36",()

A.38°45'24"B.39°45'24"C.38°46'24"D.39°46'24"

6.fi?é-3’C_h7f8’0()

A.5’CB.-5’CC.ll’CD.-ll’C

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su.)

A.14“B.2^bC.34-D.4^b

8.M,￡0,A,B,C,^OEr^ZBOC,M^DOE()

A.20.5B.22.5C.24.5D.26.5

9.$0?.ABCD?ra,OAB.CB±S^a^^BD±,BE,BF,WJZEBF?Wb^J

A.15°B.30°C.45°D.60°

10.àM?AB±,()

A.AM=BMB.AB=2AMC.BM=—ABD.AM+BM=AB

2

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11.B&:WM-3.6,7,-8.4,+10,-1,

12.?Tx2x+3m=4x=-l,

13.^(k-3)A2+3=0M-TG-W?f?,?!l*=

14.B&?4>Z2=64°,flijzi

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F.F

15-{0<fê

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1768

14.557

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16.IEfS:3(tz-b)+(2a-i-3b)=

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17.(8#)M-ifcfclMji?B!W~ME^a<Jé^:

(1)T#?￡W4ffltHlE^f?Wfffl(fflaj-^Bp-Rl);

(2)^jE^aùà4?±#5ü^<^R)&<J?,

(Die3,-5,11,5,-11,-3#^??^

jr4-IY—9

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18.(8#)M,OJiK-?M?raé,O?A???ft.BCMfa.BD^ftZABE-

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(2)??Z?BE=120°,XZCBAm?..

19.(8#)2019^11^160,Mina^^ia

20.(8#)M,^AB>CD.EFfàtt-tiO,CDEEF,OG^ZBOF,ZAOE=60°.

(1)^.ZBOG^m-,

(2)OBY#^DOG<??iiWJMè.

21.(8#)B$flZCOD=90°,aZC0DM0MI^AB±.

ffl1

(DM1,

?aZBOD=20°H},Z.AOC°?

?^ZBOD=55°^,ZAOC?üJ?^°;

?%ZBOD=a,MZAOCtfyR&R#a;

(2)M2,??ZCODfaf?ülOC,OD#%!&&&AB

?aZBOD=28°30'fft,ZAOC&J%#&);

?ftl@3,SOBfèt&^ftZCODtt,ZAOCttm.°;

?ffl2*,%ZBOD=a,jUlJZAOC■

22.(105?i+31:(1)(-5.5)+(-3.2)-(-2.5)-4.8

3

(2)-14+l-jx(-l)

1171W11

++

(3)itM:4121836JA36JHX??HA

23.(105?

-2X2-|[3/-2(X2-/)+6],M4?x=-l,y=-2.

24.(125?fclffl,AD=-DB,BE=-AB=2cm,^.^AC^DE^.

23

■____?i--------1-------->

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[WM1WJ/httiS^&W^5x*/#,

èJSM:5-5x-5-3x=4(X),

f?Wx=40,

Jü!l5A=5x40=200(^),

HP/h#ffi^6üM^200

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3>D

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[WW]W:90°—51°14'36"=89°59'60"-51°14'36'=38°45'24".

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6.A

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7,A

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tt^W?a^J^gpnT???g￥^MB^@?^J^rBPnr.

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58°.

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Z

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z-=x

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30x=45(x-1)-15

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4x30=120(A)

g:??m^lWA^120A

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A?,W^M.

20,(1)30°;(2)OB^ftZDOG,Sè?

[WJ(1)èW?éKM^MZBOF,ZBOG=-ZBOF,AMWW^;

2

(2)WfflMW￡5CM:ZDOF=90°,^mZBOD=ZDOF-ZBOF,^ZBOD,ZBOG=30°,A

ffijnTWénia.

LWM1M:(1)VZBOF-ZAOE,ZAOE=60°

:.ZBOF=W>.

'.?OG^ftZBOF,

:.ZBOG=-XZBOF=-X60°=30°,

22

Z.ZB?G?ùMA30°.

(2)OB^ftZDOG.3Sè&T:

CD-LEF,

:.ZDOF=90°

VZBOD=ZDOF-ZBOF,

:.ZJ5OD=90°-60°=30°

AZBOD=ZBOG.

VZ-DOG=ZDOB+ZBOG,

OB^ftZDOG.

21,(1)?70;(2)35;?90°-a;(2)?118°30';(2)135;(3)90°+a

(1)?èZAOC=180O-ZCOD-ZBOD^IüBPBT;

?éZAOC=180°-ZCOD-ZBOD^LBBPRT;

(3)èZAOC=180°-ZCOD-ZBOD3&WRT;

(2)?MZBOC=ZCOD-ZBOD^H1ZBOC??M$§ZAOC=180°-ZBOCZAOC?üMWn?;

?è?§;t&ZBOC=?ZCOD,j￡tHZBOCWjOtSfêf?ZA0C=180°-ZB0C;￡HlZA0Cf?O?PRr5

?|g^ZBOC=ZCOD-ZBOD^{±lZBOC?,W$gZAOC=180°-ZBOCjfcHiZAOC

(WJt?:(1)?VZAOC+ZCOD+ZBOD=180°,ZCOD=90°,ZBOD=20°,

ZAOC=180°-ZCOD-ZBOD=180o-90o-20o=70°.

(2)VZAOC+ZCOD+ZBOD=180°,ZCOD=90°,ZBOD=55°,

ZAOC=180°-ZCOD-ZBOD=180o-90o-55o=35°.

(3)VZAOC+ZCOD+ZBOD=180°,ZCOD=90°,ZBOD=a,

ZAOC=180°-ZCOD-ZBOD=180°-90°-a=90°-a.

(2)(DVZCOD=ZBOD+ZBOC=90°,ZBOD=28°30',

ZBOC=ZCOD-ZBOD=90o-28°30'=61°30',

VZAOC+ZBOC=180°,

.?.ZAOC=180o-ZBOC=180o-61o30'=n8°30'.

(2)VZC