1.2 第2课时 直角三角形的全等判定-2019-2020学年八年级下册初二数学【名师学案】(北师大版)

! ! ! ! ! ! ! ! ! ! / "# ! 5'&'(+$%/0 *+,- !! f# ! "!"%" " %"% " %%" " """ " <= ./0 !! # # $ %%" ! # / $ %"% ! # ( $ %%" ! # 5 $ <= ! # & $ "%" ! "14 ! #1% ! $1% ! %1 ! ! &1+ ! '!& h #* 120 (1+ ! )1+ ! !*14 ! !!!5 ! !"! RS ! !#!( ! !$! % & ! ' 9: # $#" ( 9: # "%$ ) " $"$"$ " $#$"% ( " ,9: # $#" ' 9: # "%$ # <= $" , " $"# $ " "$%!,$&$"&! ! !%! % & ! - $% 1 # $"# . j " , " $%# $ " "%) $3*'! ' 9: # $%# ( 9: # "%) ) " ")$$# " )%$#% ( " ,9: # $%# ' 9: # "%) # <= $" , " #$% $ " )"%!- " #$%. " #$3*' " , " )"%. " #$3*' " , " "&#$3*' " ,"& ( $#! 34 $ . !&! * !# # $ ' 9: # $") ( 9: # #%& ) " $"$#% " ")$%& ( " , 9: # $") ' 12 # #%& # <= $ !,$)$#&!,$)8&) $#&8&) " K $&$#)!-%& ( $# " ") ( $# " , " %&,$ " "),$3*'! ' # %&, ( # "), ) " " %&,$ " "), " " %,&$ " ",) " , # %&, '# "), # %%" $ %&$") $ % & " ,,%$ ," %# / $ $&$#) " ,%$," klE F ! % & ! ' 9: # $") ( 9: # #%& ) " $"$#% " ")$%& ( " ,9: # $") ' 9: # #%& # <= $" ,$)$#&,$).&)$#&. &) " $&$#)! ' # %&, ( # "), ) " " %&,$ " "), " " %,&$ " ",) " , # %&, '# "), # %%" $ %&$") $ % & " ,,%$ ," ! ' $$ !"#$%&' ! !" (%() *+,- ## !!! ! $ "# ! """"""""""""""""""""""" " " " " " " " " " """""""""""""""""""""""" " " " " " " " " # ## # @'&'(+$%12 !! EK�*@�"K#$%&,!-�"." / ! f# ! ! $! :ñ�"."/0&,°n� ! *"* " "*" " ""* " *** " ;< ! ! $ ./0 ! ! @'&'($%+12 !! 67 $ 89 & "#% � 89 & $&( $ % %% % (%5-.! ! ! " 8 % " % % $ $ #% %&( $ ; 89 & "#% ' 89 & $&( ,lMB ! ""* ! & ! $ " 8 % " % % $ $ "% % $( $ ; 89 & "#% ' 89 & $&( ,lMB ! "*" ! & ! * " 8 % " % % $ $ "#%$& $ ; 89 & "#% ' 89 & $&( ,lMB ! ""* ! & ! / " 8 "% %$( $ "# %$& $ ; 89 & "#% ' 89 & $&( ,lMB ! ;< ! & ! 2 " 8 "% % $( $ %# %(& $ ; 89 & "#% ' 89 & $&( ,lMB ! *"* ! ! $! �!-�"."/0&,@AB ! 3 " "& *-�"#$%& '& !-�"#$%& (& *@K#$%& )& !@K#$%& *! 67 $ RS "$ B & "#% , #% KL,M $ hi� � & "#$ '& "%$ ,@AB ! " " "&"#%"% '& % #"%%5-. (&#$%"% )& % #%/2. ! * "# ! / "# /! ! !" + $! $) * %& " 67 $ ' B % #"% T*_ $ '_ ' e "# $ "% ,ßà '&%'( $ ; & "&' ' & "(' ,lMB ! " " "&=> '&""# (&### )&"#" 2! 67 $ Y 89 & "#% ,EK #% Lmn %$%