1、.:/,4Af.:$!-.-,:.201s*MM-ht.l JJ.112-i/,._ ll it:&Il:1.*-ii:.t-6,120.:tii:.effEi 100 it.2.ii:.J!t-J:.-1$:J!,itJf-l 0.5-l;Al,f.t,j(.Ji.ft.-.(f$;Q:t J:.$.(f ii:.;f!t-J:.i:ifJJl,fflJIJ.6ADE.LCAE=65,LE=70,Jl AD.1BC,.m!JLBAC(fJlfi A.60 B.75 c.85 D.90 lll(6:9!)7.LEAG 8.9.1(l l DE.D EfiC B D A B Jl6.JIIII
2、Jl7.JIIII 7.re:itl*ffl(l(J.IE1i:itl ABCDE ltl.IE:JJ ABFG ffil:fm!l3r(l(J1i:i:tlt-,Ji!U LEAG(l(Jlf A.18 B.20 C.28 D.30 A.2a+2b-2c B.2a+2b C.2c D.0 9.tEM*ttMfi-=fA,Boo.*Mfi-7+Dt,-Mfin itW 9,J,et,BlJ(mfilflfjj,J,et 3km,*A,B-iij!k00(1(Jffi1j,A,B 00ffi1i X,Ji!ljJnjtl:Ji X X A.-3=-+3 7 9 10.roo(l(Jn.1r-it
3、ff=B.=+9 7 9 C.+3=7 9 X X D.-+3=-3 7 9.1 W!Ax r itffSx+IH WllllH I-AlOO,tlita.*501:WiA25,Witii!a.*631.:fftfiA(l(JxffiIE!llc,M:JatJHil!a.*556,li!U:ffifiA x 1JffiiiJlf A.4 B.3 C.2 D.1 fil=-taII fi.f.1!3:51-,15:51-)11.:X:r x(l(:JiN 2x+a=9-a(x.:.I)(l(JM:l:x=3,JIU a(l(Jffi-12.!I,tfC.AB=AC,BC=4 c,ABC 7J B
4、C 1.f(ii3f8JIJDEF,DE=6 cm,EC=1 cm,Jltllm:itIW ABFD(l(Jffll*-cm.IL B E C F;a12.J1!11.#U3.IIIII 13.:fin!),Ji!IJLA-+14.rjtl1!=m.r-e;(I(wr-t 1fJ lll:.*1:!I,1B(I(*1:tdl l 15.BTX-=.,-*:k&:;Jt I 16.:;Jt 2,J,B,_)(2)6)M1iNffi:11.I lzfi iffl.JIJ.6.DEF,13.:!nJOO,IIJLA+LB+LC+LD+LE+LF=.1,;.,fl.14.rJd?i:CD.=:1foi
5、t.JfA3!fJlllr 1so0,!fJlar 360:.=:!fJt.J-1-!fJ rBl.JWj1-f3!fJla:.=:jfjl.J.:it17 3,5,X,Ji!IJ x 1.Jffimli!2x8:!fJJHd!m.!fJ1.J!fJ1.J*tt-tt1.J%)-C r lr.i_ I 5.c T x 1.J:f J:ffl X-:O 9-3 1-11 M,Jl!lj 11 a 1.1 ffi m Ii.5-2:xl,.;I!_ _:,-(*.I!8.f!,*75*)16.(2,j,J!,12)x-3(x-20.M:x2-9=(x+3Xx-3),:.(x+3Xx-3)0.Mj:
6、ffi(l),fflx3,-j:ffi(2),fflx 0(l(JM1 x 3 x 0(l(JM,i x3x-3.JsiJ.fi:*,ti:ti:t 5x+I O(l(JM#t 2x-3.-t.-fl.U gf_(1t 6 gj_)C F A/X 21.(9,t)Jfli:!WOO,LBAJ*i.iE:LBAJ i.iE?i 1:LACD+L3.LBAE+L.LBAE+L.-.-22.(11,t)(1(19:4-,jt b 14ff:i:i B JHSti-6 li(I)*a,b(2)ffiff:WJ:n:0).tf(2)1#it5ii.l-tiit-i 21.(9:$t)fflW3#1Jii
7、l:IY.=ff.lAJ91f.lf 360.:tm.LBAE,LCBF,LACD ABC tfl.=1-91f.l.*ill:LBAE+LCBF+LACD=360.ill:I:LBAE+LI=I80,LCBF+L2=180,LACD+L3.=180:.LBAE+L 1+LCBF+L2+LACD+L3=I80 x3=540.:.LBAE+LCBF+LACD=_ _.-.22.(11 5)-)17J!iHtki!PJj,ffl75iiE.,tl)10 157J(J!l2:4:J.Ylfl A,B W3#AJ4.(fl.J!lr5J(t:!m:A Bm M-(j jf:Jft_)a,.b J!I*
8、(llitY)240 200:J!g-A4Jtg-B42jjr,tlJ2A4J!g3 B4&67Jjr,.(1)*a,btflffi:2)ffiff:ffl0iiJJ!gl5*J!l4-AJfiMHi ios li5i:.,iA1WJfll!SJL#1J:0)tE(2)fi:iJAl*-flff,*J!lr5J(:l:iir 2040!lit!,1Tilf.Jfi,i$1ffl75ii-(fl1J.23.(IO 7t)icJH-:tmOO 1,ti,.pg),=ff.I PMN AJW34 iAf11 LABP 1:j LACP(1)-:tf L LABP+LACP=-fl(2)-:if(3)jg1tfl:!ml(fl jij*Jiff.I it.I.PM,PN ii1itt iliA:*-*:f*?.*?.*=*?-:!OxHi*:*
