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1.1.1ᳮ•ᦟ᪗ᢈᐵḄ!"#$%ᳮḄᑁ'(ᐸ*+,-./0ᵨᳮᑁᳮ23Ḅ45678⚪;,-<=>?ᨵḄABCD,ᐳG!HᙠJ#ᐸḄᐵ#KL=MN#OL#PQ#ᵫᱯTᑮVWXYCᳮ#Z[\ᳮ67]ᵨḄ^_`abcefMgh=ᙠ,;ijᢣLlᜐᳮ28⚪Ḅ0no.gh=ᔠbOᳮ!"ᦪrsḄᦪiijo#tᦪஹᳮஹᔣwḄᦪwxyzḄὶᩭ}~ᱥzḄὶ*V•ᦟᳮḄ!"*+(ᐸ67]ᵨ•ᦟ?4ᐸJVḄ2ᑨ2Ḅᦪ•ᦟ;⚪Lᐭ1.1-1,AABCḄCB(/B,ACḼ⚔CiὃZCḄᜧ¡ḄABḄzᨵ¢᪵Ḅᦪwᐵ¤¥ᯠ#ABḄ§ḼᐸNCḄᜧḄ©ᜧª©ᜧᔲᵨVy¬®¯ᐵ°±ᙢ⊤´Cᩭ¤µ.¶ᣴ¸¹!"ẆH»ᙠ¼J#ᡃ¾¿B2À#l⊈Â✌ᐜᩭ!ÅÀJ#Ḅy¬ᐵ#ᙠRtAABCJ#ÈBC=a,AC=b,AB=c,᪷Î┦tᦪJtᦪḄÐ#W—=sinJ,b=sin8,ÙsinC=l=£,c#7Cabᑣsin/sin6sinCab>ªᙠÀABCJ,sin/sinBsinCiὃ1ÞßàḄ#áâᐵ¬ãᔲäᯠᡂæ¤(ᵫ=Åèஹᑖ᪆)ìᑖí┦î4¯bï1.1-3,(1)ñAABCã┦#ÈABâḄòãCD,᪷ÎtᦪḄÐ#bᨵCD=asin6=Asin/,ôijsinJsinB
1bGᳮìöVysmcsinBab>ªsin/six\BsinC(2)ñúABCãî#áâᐵ¬äᯠᡂæ(ᵫ=ûü¿OL)iὃ2ýᨵᐸ,-ᔩ¤ᵫàÿ ⚪ὃ⇋ᵨᔣᩭẆ⚪()AᓫᔣᵫᔣḄ$%AB=AC+CBᑣJ-AB=J-AC+CB.J-AB=J-AC+J-CB|(||Afi|cos.900-/l4=0+|(||Cfi|cos.900-C4csinA=asinC,ᓽ =-./sinAsmc=ᳮCᐗ%@=3b_csin3smCsinJsix\BsinC@☢ḄẆCD%EFᳮHIFᳮᙠKLMNOPᔜRSᡠUNḄHIḄVWXᓽsinJsin^sine[ᳮ\Fᳮ](1)HIFᳮ_`=KMNOPaᐸUNḄHIᡂHVdVefᦪh=KHᦪiijᙠHᦪkla=4sin4,b=ksinB,c=ksinC((2)3=@=Xop--=@-=@3=3sinJsin8sinsinAsinBsinCsinrsin/sinCsὃHIFᳮḄtuᵨvwxyজ{|MNOḄ}~N ᐸKᐸa=(smBঝ{|MNOḄ}~aᐸPKḄUNᐸNḄHIsin4=msin6b•ᙢ{|MNOḄRNᐸḄRNḄD\MNO[e⚪ᑖ᪆]e1.ᙠAA8CP{|A=32.0°,8=81.8°,a=42.9cm,\MNO\᪷MNOᑁNRFᳮC=180°-.4+B4=180°-.32.0°+81.8°4=66.2°(
2“inB42.9sin8)(᪷HIFᳮb=sinAsin32.0'᪷HIFᳮ0=£^=42.962°74sinAsin32.0°Up\MNOPḄᩖlᵨ¡ᘤ£¤ᙠM8CP{|Eᑡᩩ§\MNO(1)A—45°,C—30°,c=10cm,(2)A-60,8=45°,c-20cme2.ᙠAABCP,{|a=20cm,b=28cm,A=40°,\MNO(N¨©ªᑮ1°,©ªᑮ1cm)\᪷HIFᳮsin8=^^=28s¬40'>-08999,h0°<8<180°,ᡠ"64°,ᡈ8~116.a20(1)¯8~64°°C=180°-(A+5)»180°-(400+64")=76°,«30(cm).sinAsin40(2)¯8ᑗ16°°C=180°-(A+B)B180°-(40°+116°)=24°,²3().´µ~{|RᐸPKḄUN\MNO°¶ᨵ\Ḅ¸O¹ᚪ£¤»4⚓£¤»2⚪sὃ⚪ᙠ½ABCP=HA>)LkaAABCᨵwxᐵfysin/smz?sineM.¹°¿À(ᵫÁÂÃÄÅÀ)ba+b+cপFᳮḄ⊤ÈOÉÊ=A(Q°)sinBsinCsinË+sin8+sinᡈa=Asin/,b=ksinB,c=ksinC(A>0)(2)HIFᳮḄ´ᵨÍজ{|NR}KᐸS KN(ঝ{|RᐸPKUNÎKKḄUNÏ.¹ÐÑP10☢1ஹ2⚪
31.2\MNO´ᵨÓe»K¹°KஹᦟÁÕ᪗1ஹ¶×ᵨHIFᳮஹØIFᳮX|ÙRÚ\ÛKᨵᐵÜÝÞḄß▭⚪á\âᵨḄÜWᐵãä2ஹåæÁÂÁ¤ᦪÁḄᐶèéêëᦪÁḄ´ᵨo(=°ìíÁÂᵨîOஹᦪÁï⊤ð⚪~R´ᵨñᓄsó\ÛᦪÁ⚪Ḅ¶ËஹᦟÁôஹõᦟÁôᵫß▭⚪Pö÷øKLᡈùLMNOᯠÐ⌲L\ÛMNO%ᑮß▭⚪Ḅ\ᦟÁõ᪷⚪~üýᦪÁþÿ ஹᦟ1ஹᳮஹᳮ!"#$%Ḅ'()2ஹ+,./0123456☢89:;<“'(”? ᡃ⍗ᑮC;D⚪ “⍩GḄᨴIJᡃᙢᳫMNᨵPQᕖ)”ᙠUV ᜩᦻYZᨵᐜ\Ḅ]ᘤ_`abcdeὅḄgJ hḄjklmᑮCDᝍoḄᕖ)ᡃ⍝ qrsḄgJஹtuv wᙠḼyPz⌱|Ḅ}~jᫀ ᵨᐰv'(ஹ'(Ḅjk ᡈ''(vvGḄjk ᵫrᙠ▭}~⚪Ḅ #jkGZᨵḄ Gᵨᐰv'(Ḅjkᩭ}~ ᡠ ᨵ#jkᨵ¡▲ឋr¤☢¥¦Ḅ⚪ᵨ6ḄjkᡠG!Ḅ§ᜩᡃ¨©ᳮஹᳮᙠª«?Ḅ¬⌕ᵨ ✌ᐜẆM°}~gJ3ஹ²³´ᣴ(1)!▭}~⚪Ḅ¸¹;º⌕ᐙᑖ½ᳮ⚪ ¾¿( À▭⚪ÁḄᩩÃÄᡠÅÆᣚᡂ'(?Ḅ`ÄsḄÉஹ' ʸËÌᦪÎ%ᩭÅ(2)Ï1ஹ AஹBeÒᙠÓḄeÔ ⌕}~eÒÕḄgJ }~ὅᙠAḄÖ ᙠᡠᙠḄÓÔÉ⌱;ÒC,}ACḄgJ55m,ZBAC=51°,ZACB=75°ÅAஹBeÒḄgJ(ß¾ᑮ0.1m)ffll.2-1
415AABC? ᪷ã`ḄÉÄq' äᵨ"Dᳮå〉ç)25äᵨèᳮ⚪é◤⌕ë#ÉÄ'ᕖ)./01ᑖ᪆5C;⍝ᐵr}~î;DᑮïḄÒᑮ;DGᑮïḄÒÕḄgJḄ⚪ ⚪ðᩩÃñòdÉABḄq' ACóÉ 4᪷ã'(Ḅᑁ'Äᳮõö᧕᪷ãeD`'cACḄq' ᵨᳮcABÉ5᪷ãᳮ øAB=4csinZACBsinZABCAB=ACsinZACB-55sinZ4CB_55sin750-55sin75°gg7)sinZABCsinZABCsin(l8(P-51°-75O)sin54°:AஹBḄ65.7"#$%&'(ᛞAஹB*+,-./CḄ012akm,(ᛞAᙠ-./CḄᓅ9:30°,(ᛞBᙠ-./Cᓭ9:60°,ᑣAஹB?Ḅ@ABὁDᢣFGHIJKLMᦪGOPRᶍ'V2akmV2ஹJKAஹB0ᙠXḄYZ([\ᑮ^)K_`abcdAஹBḄefᑖ᪆'ijV1Ḅ#$⚪KẆmḄjn[\ᑮ^Ḅ?Ḅcdo⚪✌ᐜ◤⌕᪀⌼vwxKᡠz◤⌕{|CஹD᪷|ᳮvwxḄnᑁw*a\ḄefKᑖACBC,ᑭᵨ|ᳮ\z`ABḄ1.2-2R'cdὅ\zᙠXZ⌱|CஹD,cCDa,ᙠCஹDᑖcNBCA=a,ZACD=p,ZCDB,ZBDA=8,ᙠADCBDCKᵨ|ᳮAC=asin(/+(y)asin&+6)sin[18(F-(/7+/+(7)]sin0+y+6)BCt-sin7asm/sin[18(F-(a+/7+/)]sin(a+P+y)`ACBC§KᙠAABCKᵨ|ᳮ`ABḄAB=VAC2+BC2-2ACXBCcosaᑖ«¬'®¯ᨵᐸ²ḄefᕖBDHa´Y[µef¶·Y¸ஹᑖ᪆
5#$¹%'ºᙠXZ⌱»¼40"ḄCஹDKc/BCA=60°,NACD=30°,NCDB=45°,ZBDA=60ᶍR'½⚪ᔜd¿ᐭV2ÁḄÂ$KAB=20ÃÄÅ'\ÆKᙠẆmvwxÇKᮣÉ᪷n|ᳮ\zÊËᑮ@bRÌo⚪ḄeᫀKÎᨵÏÐÑÒÓÔKÕËᑮᨬ×ḄefKᨬØ⌕Ḅ®jᑖ᪆n|ᳮḄᱯKÚᔠ⚪ÜᩩÞᩭ⌱àᨬáḄ`e$4ஹGH▅ãäå4⚓KçRcdèéḄᭆëKËᑮHÉḄ¼Vì5ஹäᚪ%&'äåî14⚓%&î1ஹ2⚪6ஹïðñÚRòvwxᵨ⚪Ḅaóôõ'(1)ᑖ᪆'ᳮR⚪Kᑖö*÷KIøJ(2)LO'᪷ᩩÞ*RÜ᪗Kúd*RdûdüᙠᨵᐵḄvwxKLManRòvwxḄᦪGOP(3)R'ᑭᵨ|ᳮᡈ|ᳮᨵÿᙢᦪḄ(4)ᡠḄᔲᔠ▭▭!⚪Ḅ#ஹ%&'(1ஹ%*+22⚓+1ஹ2ஹ3⚪2ஹ/ὃ⚪12ᙠM567Ḅᓅ9:20°Ḅ=ᔣḄAᜐABᑮDCᜐᨵGH56IJKᔣM7LMJKḄOᔣM7Ḅᓅ9P40ஹQRS56ᑮAḄTUV31ᓟX56YZ20ᓟX&ᑮAḄTU[\]10ᓟX!56_◤LMabcdᑮeM567f:ᵫ⚪ijkli56YZ20ᓟX&ᑮeBᜐᙠAABCnAC=31,BC=20,AB=21,ᵫqrsᳮcAC2+BC2-AB2232ACBC31uIwsin2c=1-cos2C=312
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71.2ᵨ+%SGஹᦟ᪗1ஹdᵨrsᳮஹqrsᳮ=GᨵᐵᑮeḄᱥ¢£¤¥¦Ḅ!⚪2ஹ§¨©ᓄ▭!⚪ḄG«=¬ᡂ®¯ḄẆ±ஹ²³´µ3ஹZG¶·¬¸´ᦪஹᵨᦪḄ¹ABஹº»ஹ¼½ஹᭆ¿ḄdÀஹᦟÁDஹÂDÁDÃᔠ▭¥¦Äᐹ¸ÆnḄ¥¦£¤!⚪ÂDdABÇÈᩖḄlnÊᑮ!⚪ḄᐵËᩩÍஹᦟÎÏI.%⚪ÑᐭÓ!Ô¸Æn2ÕÖ᪵¥¦ᑮeḄØÙᱥ£¤ᕖfÛÖ᪵ᙠÜÝÞLḄÞߥ¦Þßà=á⚔Ḅã䣤ᕖfåᜩᡃÕèᩭᐳë²ìí=☢Ḅ!⚪H.ðᣴò%óðõ1ஹABBᑮeḄGöØÙᱥAVØÙᱥḄᨬ£DiøGù¥¦ØÙᱥ£¤ABḄ=l1.2-4ᑖ᪆:ABüḄᐵËᐜAE,ᙠAACEn, Cᑮᱥ⚔AḄCA,ᵫCAḄAEḄ!⌱#$ᩩ&'()HG,,HஹGஹB/ᙠ1$ᩩ2)3ᵫᙠHஹG4ᵨ6ᘤ8AḄᑖ:;aஹ/,CD=a,6ᘤḄA;h,CDᙠAACDE᪷GHIJᳮ8AC=asin-AB=AE+h=ACsina+h=sinasin/7+hsin(a$)sin(a-p)V2ஹYᙠZ⚔[ᛞ3Bᜐ8ᙢ☢3$AḄ`a=54°40',ᙠᛞfCᜐ8AᜐḄ`
82=50°1'hi[ᛞBCᑖḄAj27.3%ZACDnopᑮ1mrs:᪷Ghiᩩu,ᜧw x⚪zᫀᔩ}~ᙠABDECD,ᑣᐵ◤⌕ᩩᕖ}!◤BDs!CBDᕖ}!✌ᐜAB᪷G/BAD=a8!ᙠAABCEZBCA=90°+/?,ZABC=90°-«,48ZBAC=a-NBAD=a.᪷GHIJᳮ——sin$©sin(900+p)ᡠAB-8Csin(9O0+0-B&OᵬᙠRtAABDE8BD=ABsin/BAD=^^sin(a-J3)sin(z—027.3cos50Tsin5£KT27.3cos50rsin544(y&/ஹᦪGᐭ38BD--------o-------ª177(m)sin644O-5(fl')sin439fCD=BD-BC«177-27.3=150nmr«!ZḄA¬j150®.¯ὃ!ᨵ²ᨵ:Ḅ³ᕖ}~ᙠAACDECD,ᐜAC¯ὃAC?V3ஹY•µ¶·ᙠ•ᩩ&'Ḅ¸¹3ᔣH»¼½,ᑮAᜐ¾8¸¹ᓭÀÁᜐ$Z⚔Irᙠ»Ãᓭ15°Ḅzᔣ3,¼½5kmÅᑮÆBᜐ,8ÇZ⚔ᙠ»Ãᓭ25°Ḅzᔣ3,j8°,ÇZḄA¬CD..¯ὃ1!ÈCD,ᜧw¯ὃᙠÉ/ÊEẆÌÍÎ〉ᔠᕖ}nᙠABCDEr¯ὃ2!ᙠABCDEhiBDᡈBCÒCD,᪷Gᩩu᧕ᩩḄ}nBCr:ᙠAABCEZA=15°,ZC=25°-15°=10°,᪷GHIJᳮ—=—,BC=4'sin>ª7.4524nkmrCD=BCxtanZDBC=«BCxtan80«=sinAsinCsinC1047nmr
9«!ZḄA¬j1047®III.Õᚪ×Ø!ÕÙÚ17⚓×ØÚ1ஹ2ஹ3⚪IV.Õ¾ÜÝᑭᵨHIJᳮßàIJᳮᩭ⚪¾⌕âãä⚪å᪷G⚪æçzèY,⌕é8êᡠëḄìíîᧇEð¼ñòஹóôõ⌕ö÷ð¼〉øḄùᓄV.ÕÅû£1.2/ÊüᵨýVÚ/Õ¾$ஹᦟâÿ᪗1ஹᵨᳮஹᳮᨵᐵḄ▭⚪2ஹ!"ᔠ$%&ᓄ()Ḅ*+,-.()ᨵᦔஹ0ஹ23ᙢ56ᑮ89⚪Ḅ!:;ᩭ-⌲>.()?2@ABC-DEF3ஹHI()JK⚪ஹLᑖ᪆⚪ஹOP⚪Ḅ,-QR@()Ḅ8STUVஹᦟ(XYஹZYXY[᪷]ᳮஹᳮḄᱯY_ᑮ`ᩩbᡠdḄᐵeZY[ᮣgᵨᳮᳮᐵhḄ⚪Fஹᦟ(!:I.j⚪kᐭmnoprJ[s☢ᡃv(wxz{|}~-▭ᓄ`FḄdᐸḄ⚪ᯠᙠ▭Ḅ)g;-v⍗ᑮḄ⚪-ᙠḄ☢zLᜫᔣ-ᢝḄᔣᕖ¡ᜩᡃv£Ḽ8¥☢Ḅ{|⚪H.¦ᣴjm©¦r©1ஹª-⁂¬AK@-ᓅ¯°75°Ḅᔣ±67.5nmile²ᑮ³´B,ᯠ²¬BK@,ᓅ¯°32°Ḅᔣ±54.0nmile²³ᑮ´C.¶·¸±¹£¬AK@ᑮ³C,º+»¼᪵Ḅᔣ±,◤⌕±ÀÁ}~ÂTLᑮ0.1°,}~TLᑮ0.Olnmile ᓭ()ĪÅὃQ¦Ç⚪ÅÈ
10ᑖ᪆[✌ᐜ᪷]FḄᑁᳮdKACᡠÏḄ/ABC,ᓽᵨᳮKAC,Ó᪷]ᳮKACABḄᜳ/CAB[ᙠAABC;-ZABC=180°-75°+32°=137°,᪷]ᳮ-AC=AB2+BC2-2ABxBCxcosZABC=A/67.52+54.02-2x67.5x54.0x0081370ä113.15᪷]ᳮ-BC=/sinNCAB=BCsin8C=54.Osin137sinZCABsinZABCAC113.150.3255,ᡠêZCAB=19.0°,75°-ZCAB=56.0ì:º+»ᓅ¯°56.1°Ḅᔣ±,◤⌕±113.15nmile©2ஹᙠñYBᜐ{óôõᱥAEḄ⚔ùAḄúû-BEᔣsü30m,ýYCᜐ{ó⚔ùAḄúû26,Óþÿ 10gmD⚔AḄ4ḄᜧᱥAEḄ!"ᵨ$%&ᳮ(ᵫ*+,ᙠAACD/AC=BC=30,AD=DC=106ZADC=180°-40,.!°A=--------------<sin46=2sin2ecos2sin2/9sin"1804(.■.cos2"9=—,W29=30°0=15°,.♦.ᙠRtAADE/AE=ADsin60"=152M!ᡠ15°,ᱥO15mP!"QRSᩭ(QDE=x,AE=hᙠRlAACE/"10⍝+x(2+h2=302ᙠRlAADE/x?+h2="106([
11\]^_x=5`h=15,ᙠRtAACE/tan28=---b---=—10V3+X3.i.2(9=30°,6=15°M!ᡠ15°,ᱥO15mf!(ᵨgh])QᱥAE=8,ᵫ⚪kZBAC=6»,ZCAD=20,AC=BC=30m,AD=CD=106mY4ᙠRtAACE/sin26»=-------জᙠRtAADE/sin46»=————ঝ3010V3ঝ+জcos26=—,2=30°,6=15°,AE=ADsin60"=152M!ᡠ15°,ᱥO15mo3ஹqrs‷ᙠAᜐvwᓅyz45°^{9|}ḄCᜐᨵ⁂$ᓭyz75°ḄRᔣ10|}/ḄOᔣᡃ|rs‷ᓽ14|}/ḄOḼRᔣrs‷Rᔣ[◤⌕¡[¢!£¤᪷¦⚪k§¨R©ª[ᦟ¢¬v®¯ªᦪ±²ᑖ᪆!µ⍝⚪Ḅᐵ·¸¹º¨f»Ḅᔜ½ᓽ◤⌕¾ᐭµÀÁÂÃ!ªQrs‷ABRᔣÅÆxÇᙠBᜐ¡ᑣCB=10x,AB=14x,AC=9,ZACB=750+45°=120°(14x)2=92+(lOx)2-2x9x10xcosl20°QQ/.ᓄË32x2-30X-27=0,ᓽx=—ᡈx=--(Í)216ᡠBC=lOx=15,AB=14x=21,
12Îᵨ»•/DAr8Csin120°15g5`Ñ<sinZBAC=----------=—x——=----AB21214ZBAC=38°13',ᡈNBAC=141°47'"ÔÕᔠ⚪k,Í(.•.38°13'+45=83°13'M!rs‷ᓅyz83°13'RᔣÅÆ1.4¡.×Ø!ᙠf»/ᡃÙ,᪷¦$%ÚᦪḄ&Ûᑮ\ÀÝÞᨵᐵwß®àḄᵨ⚪áâãä¡åᡠḄ¸ᔲçᔠß▭kÛéê¨ß▭⚪ḄIII.ìᚪîïìðñ16⚓îïIV.ìóf»Ḅᵨ⚪ôõö⍗ᑮ\øùú!"1(*+Ãûü+Ãᐰþÿ ᙠ ᑭᵨᳮᡈᳮ2ᡈ!"◤⌕⌱&ᩩ()*Ḅ,ᐜẆ/0⌲2ᙠᐸḄ 456⚪ḄV.;<=>
131.2?ᵨ@ABC;"ஹᦟFG᪗1ஹJ*KᵨᳮஹᳮLMNOPQ2RᨵᐵḄ6⚪UVḄ☢XYZḄ[ᓫ]^N?ᵨ2ஹ_⁚;⊡ᐙcdḄ☢XYZeᝯgᶧi^Fjklm"no5pYZḄᱯrstuQᙢᐹxKᵨyzᐵḄ⚪{|_⁚;Ḅkl⚪x~c☢ᡠFMḄjKᵨᦟ⌕Fj᥎FjᙠᐹxḄk ᮣVᳮNᳮḄᱯrJ⚪⌕FjUVcᳮḄᱯrJ▎ᨵᑭᙢQ2ẚr3ஹFjQ2ᡠFḄM¡¢£ᡠFᳮḄᳮ¤¥¦dJ§¨Q2©ªFjẆ/N«~J§Fjᙠ¬/ x៝¯Ḅᡂ±x²ஹᦟF³rஹr³r´]^Ḅ☢XYZµR[ᓫḄzᐵ⚪Gr´ᑭᵨᳮஹᳮᩭ4k[ᓫḄkl⚪ஹᦟF·¸I.;⚪^ᐭ»¦g¼¾´¿ᡃÁÂÃÄ·cḄ☢XYZÅᜩᡃÁᩭFÇÈḄ|⊤ÊYZᙠËABC ÏBCஹCAஹABÐḄ¥ᑖÒÓÔh”ஹh,ஹh«,ÙÚÈÁÜᵨÏN⊤ÝÞj´h=bsinC=csinBh=csinA=asinCh=asinB=bsinaAafcc´᪷è¿F·Ḅ☢XYZS=1ah,?ᵨ¿Ð45Ḅ¥ḄYZh“=bsinCëᐭì2¿]^5í☢Ḅ☢XYZS=-absinC,ᜧðJ]5ᐸÈḄñYZᔩÞ2j´mᳮìóS=—bcsinA,S=—acsinB22II.õᣴd;»Aõ¾A1ஹᙠAABC ᪷èíᑡᩩ(4Ḅ☢XS(úûᑮ0.km?)(1)a=14cm,c=24cm,B=150°;(2)B=60°,C=45°,b=4cm;(3)Ḅᑖa=3cm,b=4cm,c=6cmᑖ᪆!"⍝ᙠ%&ᩩ()*+,Ḅ☢.Ḅ/⚪123+,/⚪ᨵ5ᑗḄᐵ81ᡃ:
14;<=ᵨ3+,☢.Ḅ?1@ABC1DEBCF*G◤⌕ḄᐗK1L;<*G+,Ḅ☢.3ᶍO2ஹR1ᙠSTUVWTXZ[\1⌕]"^+,Ḅ_`ᦋ⌼ᡂdᑁfg1hijklᑮ^+,_`Ḅᩩᑖ68m,88m,127m,^_`Ḅ☢.!pqFrstᑮ0.1cm2v?wὃyz]"{▭/⚪ᓄ~"⍝ᦪ⚪ᔩF⚪;ᓄ+,Ḅ1*+Ḅ/⚪1ᑭᵨ+,Ḅ☢.f*33:[a=68m,b=88m,c=127m,᪷ᳮḄ,c2+a2-b21272+682-882cosB&O75322ca2x127x68sinB=A/1-0.75322«0.6578=ᵨS=—acsinB2S-x68x127x0.6578^2840.38(m2)2^_`Ḅ☢.!2840.38m2¡¢£1ᙠAABC\1NB=30°,b=6,c=6VL*a§AABCḄ☢.S¨©3ᨵᐵª«ᐸ\"+Ḅ/⚪1®¯ᑖ°±²3Ḅ^ᦪᫀa=6,S=9µ¶a=12,S=186O3ஹᙠAABC\,*·:,..a2+h2sin2A+sin2Bপ——j—=------;------¶c2sin-C(2)a2+b2+C2-2(bccosA+cacosB+abcosC)ᑖ᪆!"⍝ᐵ»+,+ᐵ8ឤ½Ḅ·¾/⚪1@A¿ÀÁªḄᱯÃ1ᵨÄᳮᩭ·¾·¾r1v᪷Äᳮ1;[1-=Æ=1=kÈᯠk*0,ᡠ15(2)᪷ᳮḄ1222Ñஹ1Óᓃ2+02_q222_2a+b-C,41rc+(1bÁ=2(be-----------+ca-----------+ab------------)2bc2ca2ab=(b2+c2-a2)+(c2+a2-b2)+(a2+b2-c2)=a?+b?+c?=À¡¢£2ᑨ×ØÙsinCsmA+smgᩩ(Ḅ+,,Û=cosA+cosB¨©ᑭᵨÄᳮᡈᳮ1“ᓄ+”ᡈ“ᓄ+”(3ᶍ)ß++,III.áᚪ¢£áã18⚓¢£ã1ஹ2ஹ3⚪IV.áåæçᑭᵨÄᳮᡈᳮèéᩩ(ᓄêëḄ¿ᡈêë+Ḅ+ìᦪ1ᯠíᓄîïὃAᡈ+Ḅᐵ81ðñt+,Ḅ,Ûᱯ!ᨵòᩩ(ó;ᵨÄᳮô;ᵨᳮõö;<ªὅøᵨV.áíùú
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22M@NᦪᑡᨵPᐳ7ᱯSᕖUVW8X:;YZ[⚗IḄᐵ^ᵫ8X`a%ᭆcde>ABᦪᑡfL2⚗gh<⚗ij<⚗Ḅklmn7A*mkᦪᑡy9Ḅ}k5,5,-2.5,72(প}kd<ᵫ⚗j⚗ᡠᵨj⚗⚗ᩭফnᦪ,a-«„_=ddin£ᐵḄᦪᡈn22,ndN,ᑣ§ᦪᑡntmkᦪᑡdr}k3d=0,ᑣ¨ᦪᑡroᦪᑡ.©ª(1«¬Ḅmkᦪᑡᡃ9ᵨ~⚗}ÒÔy9⊤dᩭᕖUপஹᡃ9~ÖẆØᦪᑡÙ6,ḄLn⚗iÚÛnÜIḄᐵ^ÝᑏdᦪᑡḄ~⚗}ÒḄ=☢ᵫ789᪷à~⚗}ÒḄ¿ᑏd@A*mkᦪᑡḄ~⚗}Òᵫ8XáÖᑖ᪆ᑏd~⚗}Ò(জãäᑮ@BᦪᑡḄ~⚗}Ò=5ঝãäᑮ@BᦪᑡḄ~⚗}Òa48+5(-1)
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