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        1. 盾:=,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 4蛍 =0 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 6蛍 臥心厚謹

           

          }朕双燕(淫凄基宛才盾裂)

          21、盾災?y┐n)蕁B=]C
          侭參AB[CD
          (n┬i)e(cu┛)叔犁埠云峠佩

          嗽咀?y┐n)AB[EF
          侭參EF[CD
          峠佩議f來

          侭參]BGF=]C
          埠云峠佩揖了叔犁


          2泌DAD〕BC噐DEG〕BC噐G]E=]3
          f(shu┃)苧AD峠蛍]BAC
          盾災?y┐n)AD〕BCEG〕BC
          侭參AD[EG
          揖換岷噐匯l岷議(g┬)換粁峠佩

          侭參]1=]E
          埠云峠佩揖了叔犁

          ]2=]3
          埠云峠佩(n┬i)e(cu┛)叔犁
           
          嗽咀?y┐n)蕁?=]E
          侭參]1=]2
          侭參AD峠蛍]BAC
          吉楚旗Q


          3泌DEF[AD]1=]2]BAC=70<箔]AGD議業(sh┫)
          盾災?y┐n)EF[AD
          侭參]2=
          3
           
          埠云峠佩揖了叔犁

          嗽咀?y┐n)蕁?=]2
          侭參]1=]3  
          吉楚旗Q

          侭參AB[
          DG
           
          (n┬i)e(cu┛)叔犁埠云峠佩

          侭參]BAC+
          ]DGA
          =180<
          埠云峠佩揖都(n┬i)叔札a(b┳)

          咀?y┐n)蕁BAC=70<
          侭參]AGD=
          110<

          臥心基宛才盾裂>>

          盾災?y┐n)蕁B=]C
          侭參AB[CD________
          嗽咀?y┐n)AB[EF
          侭參EF[CD________
          侭參]BGF=]C________

          2泌DAD〕BC噐DEG〕BC噐G]E=]3
          f(shu┃)苧AD峠蛍]BAC
          盾災?y┐n)AD〕BCEG〕BC
          侭參AD[EG________
          侭參]1=]E________
          ]2=]3________
          嗽咀?y┐n)蕁?=]E
          侭參]1=]2
          侭參AD峠蛍]BAC________

          3泌DEF[AD]1=]2]BAC=70<箔]AGD議業(sh┫)
          盾災?y┐n)EF[AD
          侭參]2=________ ________
          嗽咀?y┐n)蕁?=]2
          侭參]1=]3 ________
          侭參AB[________ ________
          侭參]BAC+________=180<________
          咀?y┐n)蕁BAC=70<
          侭參]AGD=________

          臥心基宛才盾裂>>

          盾今1喇}吭岑(d─ng)、\(y┫n)(d┛ng)欺昼r(sh┴)泌D^(gu┛)c(di┌n)t膨侘頁峠佩膨侘

          ×

          ÷

          ÷

          ÷ 盾誼  5蛍

          2蛍眉N秤r

          (d─ng)r(sh┴)泌D旌t嗤

          ×

          ÷

          ÷

          盾誼 6蛍

          (d─ng)r(sh┴)泌D^(gu┛)噐H

          t

          ÷

          ÷7蛍

          (d─ng)r(sh┴)泌D∠

          t

                -------------------------------------8蛍

          C貧侭峰(d─ng)r(sh┴)薺煩眉叔侘

          臥心基宛才盾裂>>

          盾今1泌DAH=AB

          2(sh┫)楚P(gu─n)狼撹羨.泌D擅决L(zh┌ng)CB崛E聞BE=DN

          ×ABCD頁屎圭侘

          ÷AB=AD]D=]ABE=90<

          ÷Rt@AEB》Rt@AND

          ÷AE=AN]EAB=]NAD

          ÷]EAM=]NAM=45<

          ×AM=AM

          ÷@AEM》@ANM

          ×AB、AH頁@AEM才@ANM(du━)(y┤ng)貧議互

          ÷AB=AH

          3泌D朷e冽AM、AN鍬孵@AMH才@ANH

          誼欺@ABM才@AND

          ÷BM=2DN=3]B=]D=]BAD=90<

          蛍e决L(zh┌ng)BM才DN住噐c(di┌n)C誼屎圭侘ABCE

          喇2辛岑AH=AB=BC=CD=AD.                          

            O(sh┬)AH=xtMC=,  NC=                             D

          壓Rt⊿MCN嶄喇拘紘協尖誼

                                              

          ÷

          盾誼.┣桟栽}吭普肇

          ÷AH=6.

          臥心基宛才盾裂>>

          盾今1泌Dc札犂講影酬孱          1蛍

          C苧泌和在BY(ji└)、

          × //

          ÷膨侘頁峠佩膨侘          2蛍

          ÷

          ×]=90º議嶄c(di┌n)

          ÷                                          2蛍

          ÷膨侘頁曹侘                                        1蛍

          ÷c札犂講影酬孱

          盾今2O(sh┬)t         2蛍

          壓Rt@嶄×                           1蛍

          ÷                                         1蛍

                                   1蛍

          ÷                                                 2蛍

          臥心基宛才盾裂>>


          揖化(x┴)(c┬)基宛