2022-2023学年江苏省昆山市数学九年级上册期末统考模拟试题含解析

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2022-2023
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1722ஹ(1)y=-2x+S,y=-1(2)D(3,2).ூᑖ᪆௃(1)Æ)C(L6)ᑖÇwᐭy=M%+8y=?ᓽq»·ᦪÉÊË·ᦪ᪆¸M(2)9)CÌCF_LxÍÎ)Ï9)஺Ì஺E_LxÍÎ)£,᪷]ᒘ⊡Ó4OADḄ☢Õᯠ@s᪷]DYZḄ☢ÕÖ¸DEḄÀ×)DḄᙶ᪗.ூ௃(1)Æ)஺(1,6)wᐭy=ᓃÛ+8,<ᓃ=q2,..y=-2x+8,k6Æ)஺(1,6)wᐭy=^,<ᓃ=6,xx(2)9)஺ÌCFLxÍÎ)Ý9)஺ÌOE_LxÍÎ)E,•.•eS|xÍ}ÞÎ)A.•.q2%+8=0,

1823ஹ(1)´V᪆µ(2)ᡂ-ᳮᵫ´V᪆µ(3)4713ூᑖ᪆௃(1)᝞y1·¸pCD¹஺OºH.»¼½¾®N3=N4ᓽJV⚪.(2)ᡂ-¾®.½¿(1).(3)᪀Á.(ÂBD,DFᓽJV⚪.ூUV௃(1)¸p¹஺஺º஻µªÄkCD1ABBC=BH-'CE=CBEC=BC•EC=BH,Z1=Z2•••ABªÄkwZAC3=90°AZ2+Z3=90°,Zl+Z4=90°AN3=N4FC=FG(2)ᡂ-;••.ABªÄkCD!ABBC=BH•'CE=CBEC=BC•EC=BHZ1=Z2ABªÄk.ZACB=90°N2+N3=90஺Zl+Z4=90°N3=N4.FC=FG

19(3)ᵫ(2)3FG=BF=CF,'BG=26,.FB=13,BD-DF=1'[BD2+DF2^169,V3BD=12,DF=5,.CD=8,BC=y]CD2+BD2=4V13•ூ]^௃⚪ὃ_ᙊᕜMᳮᚖkMᳮÇÈMᳮV⚪ḄᐵmGᮣÊËᵨᡠÌV⚪ͺ·ὃÎὃ⚪Ï.24ஹ´V᪆.ூᑖ᪆௃᪷2ῪgḄgIᔠ7JBH=HC,ᔠ!ᩩ#FH=EH-ÑPÒÓEBFCGÒÓ,᪷2A"C6ÒÓEBFCGÔ.ூUV௃¾®3•.•A8=AC,AHJ_CB,BH=HCFH=EH-...ÒÓEBFCGÒÓÕCB,wÒÓEBFCGÔ.ூ]^௃⚪ὃ_`ÔḄᑨMឋbcdῪgḄឋbᐵḄGV⚪Ḅᐵm.25ஹপU´V᪆8(-4,3),C(—3,T),஺(4,73)ফ50;(3)P(/,a)ூᑖ᪆௃(1)᪷2⚪×⊤Ù·BஹCஹD,ÚÛxDEAஹB,C,஺ᔜ]ᓽJÜÝÞḄyᑏ]B,C,஺Ḅᙶ᪗ᓽJ.

20(2)J¾ÒÓABCDG.᪷2.Ḅ☢àqr3.Ḅ☢à=ZIXZI+2ᓽJ.(3)áâ(1)JcãäÝÞḄ]Ḅᙶ᪗ÝÞåḄ]æçᙶ᪗èéêëçᙶ᪗ªêᦪ.ூUV௃V3(1)᝞yrTTTTTlI+I+FIt+T*1FT^+l+lu+l+1itl+l+l+l+1utllI+i+++■+l++lllI1u+i+++■+u+lll1-il++++■+Flll1I++++■+k+ll1-+l±lu-+l:—iIT+十-十l—1-1L^3(-4,3),C(-3,-4),0(4,—3)(2)ᵫÝÞឋbJ3OA=OB=OC=OD,ZAOB=ZBOC=ZCOD-90°AAC^BD,ACLBD...ÒÓABC஺ª.•••A(3,4),—5.c_10x10•,SABCD772—-50(3)᪷2⚪পJP(-b,a)ூ]^௃⚪⌕ὃ_ḄGîyÝÞḄឋb᪷2⚪ï⌕ð¯ḄîyGV⚪Ḅᐵm.26ஹ(1)ᔣ᜜ᜧò6.58µ(2)21714-.ூᑖ᪆௃(1)A]îAEJ_CDºE.ᙠRtAABE·᪷2ghᦪJAE,BE,ᙠRtAADE·᪷2ghᦪJDE,᪷2DB=DE-BEᓽJVµ(2)ᵨaABDḄ☢àôcpᓽªᡠ◤Ḅ+,Ḅõà.ூUV௃V3(1)A]îAE_LCDºE.ᙠRtAABE·NABE=62°.

21/.AE=AB»sin62°~25x0.88=22,BE=AB»cos62°=25x0.47=l1.75,ᙠRtAADE·,ZADB=50°,AE.\DE=---------.18.33,tan50.•.DB=DE-BE=6.58.ᦑᔣ᜜ᜧò6.58.(2)6.58x22xgx300=21714-..ூ]^௃⚪ὃ_`VÄgḄᵨ-ᚁQᚁ⚪¡ÄgᨵqᐳḄÄÓᐜqᐳÓḄV¿⚪ïḄ÷ø].