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ὃᜓὃᧇὃ⚪ᦪᔁI⌱⚪ஹ⌱⚪⚪ᨵ10⚪⌱ᔜ⚪Ḅ⌱⚗⌱ஹ!⌱ஹ┯⌱ᙳ$ᑖ1.&ᦈᐭ3ᐗ*++3,ᑣ-2ᐗ*+A.1B.-lC.2D.-2ூ/ᫀDூ2᪆ூᑖ᪆᪷56ᦪḄ789$ᦈᐭ+ᦈᐭ!:;*!:ᓽ9.ூ>22??ᦈᐭ3ᐗ*++3,@-2ᐗ*+-2.ᦑ⌱?DூBC⚪ὃDஹ6ᦪḄ78Eᙠᵨ6ᦪ⊤IᔣᢣLMᔣNᓄḄPQRSTᔣᢣLMᔣNᓄḄPUL+ᦪVTᔣᢣLMᔣḄWXMᔣNᓄḄPUL+6ᦪ.2.Z[ᵫ]^W_Ḅ`MabᡂḄdeafḄghZ[ghMᔣD.ூ/ᫀBூ2᪆ூᑖ᪆ghZᨵ3i!I,kᑡMmᦪnᑖo+2,1,1.ூ>2ZᡠI?fḄghZ[:ᦑ⌱?B.ூBCr⚪g⌕ὃDtuᓫwᔠaḄyhZTz{|}~[2⚪ᐵ.3.᪷5ᨵᐵ2022᧡⁚Ꮇ7ᜩᐰᑁ251000000.ᦪ51⚓ᐳ23⚓
1ὃᜓὃᧇὃ⚪251000000ᵨ*ᦪ⊤I+A.2.51x10sB.2.51xlO7C.25.1xl07D.0.25IxlO9ூ/ᫀAூ2᪆ூᑖ᪆§¨©ᜧ«1Ḅᦪ9¬ᵨ*ᦪ⊤Im®+“10"+ᦪ²³´ᦪḄᦪµᦪ:1,5r9¬2/.ூ>22?251000000=2.51xlO8.ᦑ⌱?AூBC⚪ὃDᵨ*ᦪ⊤I¹ᜧḄᦪº»z*ᦪ⊤I¹ᜧḄᦪm®+axlO",ᐸ_¾10,[ᦪLḄ©Á”Ḅ©[2⚪Ḅᐵ.4.ᵨÄUÅ^}Ḅ}ÆᑖÇÈᑡÅ┯ÉḄ[ூ/ᫀDூ2᪆ூᑖ᪆᪷5ÅZÊËÌ}ÆᑖÇḄL8ᑨÎᓽ9$/ᫀ.ூ>2AஹZ"AB*OCB,ZAOB=4cOB,.•.08ÆᑖNNOC.2⚓ᐳ23⚓
2ὃᜓὃᧇὃ⚪ᦑA⌱⚗[ᙠÅ}ÆᑖÇÐᔠ⚪7;BஹZ ,:ACOB=AAOD, .&OBC^OAD,0A=OB,NOAD=NOBC,NOCB=NODA,AC=BD>•••ACEA=ABED,ZECA=ZEDB, .AAEC^BED,AE=BE,•NEAO=ZEBO,OA=OB, .NAOE=NBOE,OEᑖNAOB.ᦑB⌱⚗[ᙠÅ}ÆᑖÇÐᔠ⚪7EᵫÅZ9Ñ?NAOB=NMCNQC=CD, .CD//OB,ZCOD=ZCDO,ZDOB=NCDO, .ZCOD=NDOB, .0D■AOB.ᦑC⌱⚗[ᙠÅ}ÆᑖÇÐᔠ⚪7E3⚓ᐳ23⚓
3ὃᜓὃᧇὃ⚪ᵫÅZ9Ñ?OA=BC,OC=AB,, OB=OB,“OB=ACBO,ZAOB=NOBC/COB=ZABO,ᦑD⌱⚗[ᙠÅ}ÆᑖÇÐᔠ⚪7?ᦑ⌱?DூBC⚪ὃDt}ÆᑖÇḄÅZᐰÒy}mḄឋÔÕᑨL»z¬ÖÑ×[2⚪Ḅᐵ.5.ØÙnḄ©ᙠA.4Á5ÛÜB.3Á4ÛÜC.2Á3ÛÜD.1Á2ÛÜூ/ᫀCூ2᪆ூᑖ᪆᪷5ÝᳮᦪḄØMØᓽ9.ூ>2V422??GF//AB,4⚓ᐳ23⚓
4ὃᜓὃᧇὃ⚪]ðmZEFG[Æö]ðm, .FG=AE,AG=EF,• EF//AC, .ZBFE=ZC," AB=AC, .NB=NC, .NB=/BFE, .BE=EF,.••]ðmãEüGḄᕜò[2(AE+EF)=2(AE+BE)=2/8=2X8=16.ᦑ⌱?CூBC⚪g⌕ὃDtÆö]ðmḄᑨLÁឋÔÒῪy}mḄឋÔº»zÆö]ðmḄᑨLÁឋÔÒῪy}mḄឋÔ[2⚪Ḅᐵ.7.48ÿ ᕒᦪḄᑡᐵᡂḄᙳᦪḄ!/ᡂ#$%&'(Ḅ)()A.X/>XB%.B.x>xS.S3S3D.X9%S35ὃᜓὃᧇZὃ⚪x-4=y=2154ூ<ᫀAூ?᪆ூᑖ᪆def_hᨵᵱixliylᑣzefᵱiᨵx+4l᪷C⚪ᑡ[ᓽJ¡?.ூK??:def_hᨵᵱixliylᑣzefᵱiᨵx+4),᪷C⚪:x+4=y\x_y-A~~5ᦑ⌱:AூNOz⚪¢⌕ὃS¤ᐗZ[Ḅ¦ᵨ!¨⚪©¨ᑮ«Yᐵ¬)?⚪ḄᐵT.9.¯ᙠMA/8ᵨN48C=N8DE=90°,NZᙠ¸£ḄNdA.Vl4B.V15C.4D.V17ூ<ᫀDூ?᪆ூᑖ᪆½NE¾EFLBC,ÁC8ÂÃÄNŽN/¾ZGJL8ENG,᪷C«ῪÉÊËÊÌḄឋÎJBE=2JINBED=45 Ðᑮ43=8C=,EG=AG=—AE=—.BG=—>ÑÒJ222=-,EF=—.ᯠ᪷CÕÖ(ᳮᓽJ¡?.55ூK??:¯½NE¾EFLBC,ÁC8ÂÃÄNŽNN¾/GJ_8ENG,6⚓ᐳ23⚓
6ὃᜓὃᧇZὃ⚪BE=yjBD2+DE2=2V2>/BED=45°.•.•N/ᙠ¸EḄNd .AD=AE=\,,AB=y]AD2+BD2=•••AB=BC=4i.' ZBED=45°,...Ù/EG)«ῪÉÊËÊÌ,V272•••EG=AG=—AE=—22 •,BG♦ NABC=/F=90°, .EF//ABf /BEF=NABG, /BEFs^ABG,2>/2BFEFDC BEᘤÛ,ᓽÑ=Ü=Ý,--=AB22?:ßàR•••CF=—5•*-CE=y/EF2+CF2=V17•ᦑ⌱:DூNOz⚪¢⌕ὃSãËÊÌḄᑨ(ឋΫῪÉÊËÊÌḄᑨ(ឋÎÕÖ(ᳮVåæãËÊÌḄᑨ(ឋΫῪÉÊËÊÌḄᑨ(ឋÎÕÖ(ᳮ)?⚪ḄᐵT.7⚓ᐳ23⚓
7ὃᜓὃᧇZὃ⚪10.çWN4a,b,84,CᙠÉÄ=ë+3ìíᦪk*0dîabḄᨬᜧð9,ᑣcḄð53A.—B.2C.—D.122ூ<ᫀBூ?᪆ூᑖ᪆ò“ôõöᐭy=Ax+3⊤÷øÑ᪷Cøᨬᜧð¡ùᨬò84,cöᐭy=fcc+3ᓽJ.ூK?ò4,6öᐭû=ü+3:b=ka+339ab—aka+3=ka~+3a—kaH---------2k4kVabḄᨬᜧð939...ì<0,%þ=——øHᨵᨬᜧðÿᓃ==92k4k=_,4᪆y=—x+34B4,abḄᨬᜧ99BC⊟Ḅ9.ᔁn⌱⚪ஹ⚪⚪ᨵ6⚪11.ᑖG'm2+m-.ூHᫀJJ+1Kூ᪆ூᑖ᪆ᑭᵨNOGPQRGᑖ.ூS'/+V=,”J+XKᦑHᫀ'mm+V.ூ*+-⚪ὃ0NOGPGᑖYZN[OGḄᢈ]^_`a<⚪ᐵ;.12.^bcdḄeᑁgḄhᦪ<h.i8⚓ᐳ23⚓
8ὃmnoᜓὃqᧇὃmo⚪stூHᫀ135ூ᪆ூᑖ᪆᪷>ucdᑁgvwᳮn-2 180nN3zn^ᦪKBCᑁgvᯠ}~`aeᑁgḄhᦪᓽ.ூS^bcdḄᑁgv'8-2 x180°=1080°,eᑁgḄhᦪ'1080+8=135ᦑHᫀ135.13.Ḅᨵ5eᳫᐸᨵ3eᳫv2eᳫ◀⁐.[C1eᳫ<ᳫḄᭆ᳛<.ூHᫀ|ூ᪆ூᑖ᪆᪷>ᭆ᳛OB.ூS''ᨵ3eᳫ2eᳫᐳᨵ5eᳫ᥎Ceᳫា¢<ᳫḄᭆ᳛0,x>0Ḅ®¼4*8Ḅᙶ᪗4,3 ,´>¾¿R8AB=BC,ᑣூHᫀ32ூ᪆ூᑖ᪆᪷>=BCN*ᙶ᪗~Âᐭy=«ᓽ.Xi9⚓ᐳ23⚓
9ὃmnoᜓὃqᧇὃmo⚪stூS♦••*8Ḅᙶ᪗4,3 =ᡭ+42=5•.•4S=8C,*C´µ*¶ᔠ...AB=BC=BO=5Å48´y¾¿R.9.A*ᙶ᪗4,8 ,_k. 4ᙠஹ=4X8=-,»=324ᦑHᫀ'32.ூ*+Æ⚪Ç⌕ὃ0¤¸¹º2ᦪ®¼4*Ḅᙶ᪗ឋÊÅCË*ᙶ᪗<⚪ᐵ;.15.ÌÍᱥÏᑭᵨᩨᩚµᳮÒ¼'®ᙠ*Pᜐᢞ᪷ÊᙢᙳᒴzØÙÚḄÛᕈÞ¿ßKáᨵᜧ¼ḄâãväåææḄ¶Ëçᶍ`KᑖéêᢞᙠÛḄ*4BᜐëÛìᢝÞ¿äåæîᦪAN .ïâãðwÍñÍäåæò8PᜧᑮµᩭḄ>1 özÛìᢝÞ¿ᑣäåæîᦪ__N ᵨ÷4ḄÂᦪ⊤ùK.B;ூHᫀ-nூ᪆ூᑖ᪆᪷>ᩨᩚḄ¿⊝ᩩ¦<'ÍËXÍËü=ýËXýËü`aᓽ.ூSþäåæÿ ᦪx᪷ᩨᩚḄ⊝ᩩk-PB=xnPBx=&nᦑᫀ.nூ⚪Ḅ⚪!"#ᱥᳮ&'()X()*=,)X,)*⚪Ḅᐵ.10⚓!ᐳ23⚓
10ὃ345ᜓὃ7ᧇὃ35⚪9:;.16.=!ᙠ?@A!C,ᙠ᪗D!EFGHᢚJKាMNON,0BOᑗQ£,F.TUV405=120!04=6,ᑣᐰḄYᦪ:ᢚ[Ḅ\OFBூᫀজ.60##60Yঝ.476ூ᪆ூᑖ᪆᪷bcឋeᐵQCDḄbc"!ᑣஹEஹFஹ8hᙠiMᙊk!lm6ḄᙊD!noᔠᑗqḄឋrsᚖmuᳮvᓽ.ூxe0ᐵQCDḄbcM,ᑣ0N=MNyz£|ஹMEஹMFஹMO,M0CD■N•••E~GHCOᢚJஹEஹFஹ8hᙠi“ᙊk!lm6ḄᙊD•••EজGHᢚJKាMN0/,08OᑗQE,F.J.MELOA,MF10B.NMEO=NMFO=90" ZAOB=120° .@MEOFANEMF=360°-NAOB-ZME0-Z.MF0=60°ᓽḄYᦪ60ZMEO=ZMFO=90°,ME=MF .AME0*MF0(HL).11⚓!ᐳ23⚓
11ὃ345ᜓὃ7ᧇὃ35⚪9:...NEMO=ZFMO=-ZFME=30°2ME6 .OM473cosZ.EMOcos30°•*-MN=273'CMOS.DC/.DN=yjDM2-MN2=ߟ(2ত2=76=2•••CD=4ᦑᫀ60°476ூ⚪ὃᢚJḄឋrஹᑗqḄឋrஹᚖmuᳮஹuᳮ":ᢚJḄឋreq⚪Ḅᐵ;.ஹ⚪(⚪ᨵ8⚪)17.(1)V8-(V3-1)°.(2)£¤'x+8<4x-l.ூᫀ(D1(2)x>3ூ᪆ூᑖ᪆(1)᪷«ᢣᦪஹ®¯᪷°±²ᓽ(2)᪷³⚗ஹᔠµ¶·⚗ஹ¸ᦪᓄ1,°±£¤'ᓽ.ூx(1)º'=2—1=1.(2)³⚗x~4x<~1-8,ᔠµ¶·⚗-3x<-9,¸ᦪᓄx>3.ூ¾⚪ὃ«ᢣᦪ¿ஹ®¯᪷ஹ£¤'¤UÀ!":²Áᑣ⚪Ḅᐵ;.18.ÂÃÄÅ⚪“=!ᙠ@A!bÆqZC,8ÉQO,ACVBD,OB=OD,vË@Z8CQÍ@”!µEÄÏḄËÐÑÒN¶ÂÓÉÔ.ÂÃÂÓËÐVACA.BD,OB=OD,×⚪ØÙÚᩩ!◤⌕.../CᚖÖᑖ80.⊡ᐙᩩßàËÐ.AB=AD,CB—CD,@Í@..12⚓!ᐳ23⚓
12ὃ345ᜓὃ7ᧇὃ35⚪9:áâ¶ÂÃḄËÁ!ãᙠ.¯᪾ᑁᡭ“4”áâᡂÂÓḄèÁ!ãé⊡ᐙᩩ,µËÐ.ூᫀâᡂÂÓḄèÁ!⊡ᐙ=ê᪆ூ᪆ூᑖ᪆âᡂÂÓḄèÁ!⊡ᐙAB=CB,ᵫO¤Ḅ@Í@ᓽᑨí.ூxâᡂÂÓḄèÁ!⊡ᐙAB=CB.ËЕ••ZCL8D,OB=OD,AB=AD,CB=CD.îAB=CB. .AB=AD=CB=CD,@Z8CÍ@.ூ⚪ὃÍ@ḄᑨuiïqðᚖÖᑖqḄឋr!":Í@Ḅᑨu⚪Ḅᐵ;.11111119.ñòó☢Ḅ¤'-=-+—=—I---=-1--23634124520(1)ᢥD☢Ḅö÷øùúḄoû(ᵨýḄ¤'⊤ÿ ᦪ)(2)ᵨᑖḄᨵᐵ ᳮḄ.111ூᫀ(1)-=--+—~-nn+1n(n+1)(2)!"᪆ூ"᪆ூᑖ᪆(1)᪷%ᡠ'()*+, -.(Ḅ/0ᑖ12,-2(Ḅ/0ᑖ13,-3(Ḅ/0ᑖ14,…450-.ᑖᦪḄᑖ13,4,5,… 6.ᑖᦪḄᑖ17☢9ᑖ1Ḅ:;4ᡠᨵḄᑖ(ᙳ1;ᡠ=-(«+1)(111—=---1-----n«+1«(«+1)111(2)ᵫ(1)Ḅ+,)*-(n+1)(.=--.ᵨᑖḄBCDEnn+1W(M+1)(50ᓽGH.ூIJ1K"-13⚓ ᐳ23⚓
13ὃOPQᜓὃSᧇ.ὃOQ⚪VW11111"YY-.(5=3+I=571+G5G ill11`.Ibc34123+13(3+1)'11111-2(-=--1---=-----1--;---rᵨ.5145204+14(4+1)111•••-(M+1)(.=----1-------n+1+1)ூIJ2K"11Z71l+11":|=τ==.=/0,n+1n(n+1)/7(/7+1)n(n+1)+n111—=----1-------.nn+1n(n+1)ூopq⚪ὃrᦪsḄtᓄ+, ᑖBCE "⚪ᐵvwxyz ᑖ᪆ஹ|})*ᐸᔜᑖ1Ḅtᓄ+,.20.6ᨴ13 Ḅy(cm)x(h)Ḅᑖᦪ%lᦪYx(h)• 1112131415161718y•••18913710380101133202260(cm)জ᪷%⊤ᦪ% wxoஹ(ᐝ¡¢)Ḅ£⊡ᐰ¦ᦪḄ.ঝyzᦪ ¨x=4 yḄ©ª«¬¨yḄ©ᨬᜧ xḄ©ª«¬(2)ᦪ¯°ὃY-14⚓ ᐳ23⚓
14ὃOPQᜓὃSᧇ.ὃOQ⚪VWᔠᦪ ᑏ³¦ᦪḄ9ᩩឋ¶ᡈ. 3ᦪ¯¸ᵨY᪷%Ẇº ¨»x260cm ¼½¾¿ÀᐰÁ³¦.J¨ᜩÃÄÅ〉ᔠ¼½Á³q¬ூᫀÇ1জ!"᪆4ঝy=200,x=21Ç2জ¨2,,x,,7 yÈxḄÉᜧÊÉᜧ4ঝ¨x=14 yᨵᨬI©80 35