陜西省西安市碑林區(qū)西北工業(yè)大學(xué)附屬中學(xué)2023-2024學(xué)年八年級(jí)上學(xué)期開學(xué)數(shù)學(xué)試卷

2023-2024(±)

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1.(35?mm?tmramW?.TJiJS^W￡4b

AP

2.(35?T^bsWaEMM()

A.?2,a4=a8B.a4-a3=aC.(a2)^—a5D.a4-ra2=a2

3.(35?()

4.(35?(ég±w3()

A.AB.àc.AD.A

2345

5.(35>)Z1=Z2,AC^-^-ZDAB,^ZD&J^^.(.)

A.120°B.130°C.140°D.150°

i￡TrW

'h^928090

n/r>3:2flmUW&hW'WAè^()

A.86B.87C.88D.89

7.(3ft)tl&,W^^ABCD^P,AB=3cm,WtkiW?fa,f?￡BD

8.(3#)M,BDiè./\ABCAELBD,ZC=50°,WJZCDE()

A.35°B.40°C.45°D.50°

9.(3W-Matt^a<j^MWAW<fflRa<j?7Kfeaiirt,

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17.(145?i+W:

(1)-14+|2-(-3)2|+—-r(--2.);

22

(2)(x+3)2+(x+3)(x~3)-2x(x+1);

(3)??-LlW,(3xy3-6x3y)-r3xy-(x+y)(x-y),-JVI'x=2,y—-2.

18.(45?

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21.(6#)M,A?BC41.AB=AC,CE1ABTE,AD3ECETF,W;AF=2CD.

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22.(7T)^TW“Wjffl7K,?è”,

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WHPBJ.

rW^JW:A.a2-a4=a6,^AW^^!

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5.(35>)#n?,Z1=Z2,AC^-ftZDAB,!ü!jZDMM()

A.120°B.130°C.140°D.150°

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?-^1W-:‘.'AC^^ZDAB,

:.Z\=ZCAB,

VZ1=Z6,

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5L'.'ZD-.ZDAB=2-,2,

.*.Z￡)=180°X_2_=120°,

2+3

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A.86B.87C.88D.89

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5+3+4

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7.(3^)B&l,tü^^^ABCD^,AB=3cm,fê?BWia,

C.6cm2D.12cm2

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8.(3fr)M,BD&/\ABCAEA-BD,ZC=50°,MZCDE()

A.35°B.40°C.45°D.50°

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22

AFB=ZEFB=90°,ffitBAB=BE,40WJlé^?OllAF=EF,^AD=ED,

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[^1W-:’:ZABC=35°,ZC=59°,

:.ZBAC=180°-35°-50°=95°,

‘.'BD^/\ABC

ZABF=ZEBF,

ZAEZBD,

ZAFB—ZEFB=W,

ftkABFfà&EBF'V,

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ZAFB=ZEFB

J.&ABF^&EBF(ASA),

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ZBAE=ZBEA,DA=DE,

ZDAE=ZDEA,

ZBAE+ZDAE=ZBEA+ZDEA,

ZZDEB=ZDAB=95°,

ZCDE=ZDEB-ZC=45°,

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9.(35?Z0JJf?T-Z^?3a::

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W:0.0000000033=3.4Xio9.

3.5X109.

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12.(3#)26,v=-.r+13.

[5X1o^K￡?Wij?±iawx

[#fê]M:2(x+y)=26,

y=13-x.

y=13-x.

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13.(35>)Su?,IE^ABCD4cm,8cm2.

8

[)W^]W:f?^BWSBi?=àX6X4=8cw.

2

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14.(3^)B^II5'=6,5V=3,WJS**2-^54.

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^-:5x+2>=2x5^'=6X3X3=54.

54.

15.(3^-)&lffl,W—Htt?MiW^14cm,?EIttTJOA?bW—*è*1WS'J±?

A<^______>

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14cm,BC=CH-BH=\2cm,A,

BFI^WK,éWlOAm.

[W^lW;M,WMWi?A?MM??,

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VJR?üMIKJl10cm,

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\‘CH=\4,BH=2,

:.BC=\2,

?’MB=VAC4+BC2=V57+126=13(CM)’

13cm:

13cm.

L&W1

16.(3ABCD+,ZADC=60°,BC=13,AD=CD,WJBD19.

[Wr]?AB?±M^iàAABJ,ijEHJJJC=BD,^HjJCèùM^H,

[Wg]W:

‘:AD=CD,ZADC=60°,

C.kADCMfo^fiW,

:.ZBAJ=ZCAD=f>0°,

:.ZJAC=ZBAD,

\'AJ=AB,AC=AD,

/\JAC=/\BAD(SAS),

:.CJ=BD,

\'AB=BJ=6,BC=\3,

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19.

19.

H,(7/m2=52#)

17.(14^)i+g:

(1)-14+|2-(-3)2|+?4-(-JL);

22

(2)(x+3)2+(x+3)(x_3)-2x(x+1);

(3)Tt?-ElH?.(3xy3-6x3)’)4-3xy-(x+y)(x-y),-M-'4’x=2.y=-2.

(i)

(3)l?iKàsR.'l!^

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W;(1)-14+|2-(-3)2|+—>

25

=-1+|2-3|+(-1)

3

=-5+7-1

2

=6-1

2

=5-1

8

(2)(x+3)2+(x+2)(x-3)-2.x(x+5)

=x2+6x+8+x2-9-Sx2-2x

=6x;

(3)(3xy3-8x3y)-r3xy-(x+y)(x-y)

=(y5-2x1-(x6-y2)

=y2-4X2-x2+y8

=2y2-2x2,

ax=2,y=-40t,

Jf^=2X(-2)8-3X28

=2X4-4X4

=8-12

18.(4

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2

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19.(5^>)R?K.

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fittt?WJéM<kIR]@l?jAil.

20.(6#)￡nffl,^-4-“fitzFl?,

$mAx...-202

$mHJiy...2m18

(1)k=9,b=6,m=6;

(2)SSàxM^-1Ht,tWHyfittt;

(3)12Ht,^àxtfitt.

[^tJr](l)?x=-2<1,}Ex=-2,y=2^Ay=2x+/>Wè?W;?x=2>l,

}Ex=2,y=18{4ày=kxnTWkSW;tMlf?x=0<l,ftüx=0,y=mRày=2x+6nf

Mmfit?:

(2)tBig-x=-1<1,KAy=2x+6?JMy?tfi;

(3)x<IX$?1?WI’IW/￡,JEy=12Ay=2x+6fily=9x,x?t(è,M

[tfOl(1)ffix=-2,y=2ftày=3x+Z>W2=-4+b,

f?fab=5;

flh=2,y=18ftày=M^18=2?,

mk=l-,

?E!x=0.y=niKà.y=2A+4Wni=0+6.

fa'fêm=2.

k=9,b=f>-.

(2)^x=-7<1B},Wy=2X(-4)+6=4;

(3)^y=12,x<4Bt,Mffx=3>l,é'i;

Sy=12W,A>504,W^X^>4-

X3

3

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21.(6^)$nS,/\ABC^,AB=AC,CEVAB^E,AD^CE^F,^iiE:AF=2CD.

DC=BD,&te/\AEF^/\CEB,MAF=BCHP

iiEB|:\’AB=AC,AD1.BC,

:.CD=BD,

’JCE-LAB,

ZAEF=ZCEB=90°,

VZBCE+ZB=90°,ZEAF+ZB=90",

:.ZBCE=ZEAF,

^./ZAEF^ACEB4b

'ZEAF=ZECB

<AE=EC

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AAEF^ACEB,

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B|JAF=2CD.

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22.(75?“TWEZK,i^W?MM^oo^Wl

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(1)iW^Wi+Sfl'?^;

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(3)tei+m?>[xlLffiM^300pM+^￥^ffl7K*^M12041^^

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(3)TOi+300Ti?i7^￥^n]7K*>1\W12D??W

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(2)?é50&^;M￥*^JgWT±?lM&^;,AM11;

H.6,11;

(3)12WW10+20+5=35(^),

.'.rj'li?t?>M^300i2iiWrê;300X_35=210(A).

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