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K 8!  99G     /LMN=9(L 4 "  "   "4"  "!  99G   "  7     ""*   "  7      "  #$!  3# 8!  99G ∆ J7     ""B5!  J<A @?KJ7     ""B5!  ?K<?JA @J?7     "  B5!  J?<?<JA @JK7     ""B5!   <+)  *K<+)  A D   EF  . + + . G+*3!H+.I, G+ "& !'D@8DJKLM12 E "6<8"D-12 F"6<8"D3&"& DENDFJ ,&3'" :,OK!&12 PE%FJ !' K !'!QRSQ3&R % ST"Q"%!"UR DE DF ∆D@8D DENDF*FD-ED, ,&3'"DE%DF N I ∈ ∈ EFN ∩ { } I :,∆K !'!QR SV  3&R DENDF ∆DEN∆DF *J!J, 7DND-DENDF*!, D"6! W ⇒ ∆DEN∆DF*J!J, XY∆DE%∆DF7 DND*∆D@8D,    D"6! DENDF*!, DENDF *.!7Z4![!, ,  . N . M * . N . , \E]S^_ 8O"P"Q R*S"T U""* U"V0 HO"WO"BMNX9(GA IWWY:)*:(BMNX9(GA WY>GB9)>XMA ∆D@8D DENDF*FD-ED, ,&3'"DE%DF N I ∈ ∈ EFN ∩ { } I :,∆K !'!QR G+*3!H+.I, `'""[! "&H"'H"9!R  . N . ∆EN∆F '". *J!J, 7FNE*SQDND-DENDF, *∆D@8D, "6! FNE  + N + % DND *∆D@8D, D   EF  . + + . a6Mb   Z  K   "  0I  &"  "  E**[7  76-  7  4     "  ""  **06   4'      "E[7     "  0 $%  !  5        *1  7   I N @*<<*E<E <*[<[*<<<>)  ∆E[7  @   N    \%  @E[5  @E["  E<EB A [<B5!  <A*<B A ⇒ @E[<@EB"0 0"A3& 4E[<EB"  6- 6   AB9A 6- 6  "  ""6   4 "  @E[<@[B"0 0"A3& 4E[<[B"  6- 6   AB(A 6  B9A5  B(A3&4E[<E<[ $  &@E["  E[<E<[ @E[7  @      [ E   >)  >)  >)  @E[7  @   Nc E[<E<[ E[<E N c E[<[ N c N c N c @E[<@EB"0 0"A @E[<@[B"0 0"A "  E<EB A [<B5!  <A* <B A   [<[B A < B A <EB5<A N c Nc [...]...Tiết 36 ́ TAM GIAC CÂN (Tiế t 2) Giáo viên thực hiện :Nguyễn Văn Uý .   !  "#""$%&'%()#*+ ,- *. ,- */ ,- *0, 12 "& ""341536  7  "     8. G+ "& !'D@8DJKLM1 2 E "6<8"D - 1 2 F"6<8"D3&"& DENDFJ

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