HÌNH8 TIẾT16(THEO CHUẨN)

     Tiết HÌNH CHỮ NHẬT A.MỤC TIÊU: !"#$#%& 1. Kiê ́ n thư ́ c:'(%)*%%+%,%%-%./0%%12%,%%- %./31%4%.)!"5/6%,%%-%. 2. Ky ̃ năng:'7)89!"%,%%-%.)/%%5!%!"5/6%,% %-%.7)8.3:/;)%58<%,%%-%.8!/=0%%1> )58?%%<2!/8@8%.)!/8@%A> )B 3. Tha ́ i đô ̣  '7)8.3:/;)%58<%,%%-%.>0%/%5 !%8>//%C) B.PHƯƠNG PHÁP GIẢNG DẠY$8DE)81< F%C%% C.CHUẨN BỊ GIÁO CỤ: * Giáo viênF%?G;G!HDH%: * Học sinh: F%?G;G!H D.TIẾN TRÌNH BÀI DẠY: 1.Ổn định tổ chức- Kiểm tra sỉ số: (1’) I?HJKFL#MN I?HJ7FL#MN 2. Kiểm tra bài củ:=JOB 'M9%,%,%%%P!"P8@ 'M9%,%%QP!"PR/ST   'U%/&/0%%18<A%V2%,%%Q 3. Nội dung bài mới: WX81<=OBF>9%(!"5/X4%AXH> /%(>;+%.8"#P6%,%%-%. F>$ Y ;%  !Z [  Hoạt động của thầy và trò Nội dung kiến thức Hoa ̣ t đô ̣ ng 1 \MM9%,%J]\^6$D / \8_ `a" 5/! P]P S %%,!bPS%$"`M,  F>D6A \Ma"5/%8. (6 %,%%-%. M.%%)6%,%%-%. F>D6A \8  WP  c  %0%  6  *%  %+  R \^ \M`,%,%%%8%,%%Q 1.Định nghĩa: d  %% e %Q  6   [  [  [ @ [  [  8@ K 7 f g F5/K7gf6%,%%-%. ⇔  µ µ µ µ  K 7 g f T= = = = >cPH%D6%,%%-%. ;%@`M, F>D6A \M`h*%%+%,%%-%. %@E%,%,%%%8%,%% Q F>D6A \8i$6!` F%C%4` \M6j,%%-%.c6%,% ,%%%%,%%QfP%,% %-%.P1D/0%%12%,% ,%%%%,%%Q WPc%0%6%.kV Hoa ̣ t đô ̣ ng 2 \M`Fl/0%%12%,%,% %%%h$/0%%12%,% %-%. F>D6A \M`Fl/0%%12%,%% Q  %h  $  /  0% %1  %,%  %- %.` F>D6A \8`FlP%h$/0%%12 %,%%-%. F>D6A \8g2#%N60%%18< A%V%,%%-%.`F0%%1 PR%,%,%%%0%%1 PR%,%%Q` F>D6A Hoa ̣ t đô ̣ ng 3 \8`,%%-%. *%%+6 5/P]P8@%&%. )!"5/6%,%%-%.%m  %5 !% 5 / P !1 P 8@`M, nP8@ \8`,%% Q%$! < ;4,6%,%%-%. gP!"P8@ \8`,%,%%%%$!< ;4,6%,%%-%. gP!"P8@ \8`W&%5!%%,%,%%%6 %,%%-%.oP%&p3:31 Nhâ ̣ n xe ́ t:d  %% e %Q   Y 6  %d  % d  %%  %%d  %%Q 2. Tính chất: ',%%-%.P1D/0%%1 2%,%,%%%%,%%Q 'F>%,%%-%.%A%V S%8N%>&! !bA 3.Dấu hiệu nhận biết: =\^B %4%.)8<A%VWP%0% 631%4%5] F%G3q \M\ j%5!%31%4] Hoạt động 4 \Mi$%C%4`n`] F%C%4`n`] \8FlPP/*%60/H3:8 !/ W(R\^>TT \MM9%,% i$%8)\F^I%l *%60 F%C%4 g%5!%>S,%,%%%P %A%VS%6%,%%- %. \FK7gf6%% K 7 Kgr7f ^IK7gf6% f g g%5!%=;B 4.Áp dụng: sW*%60=\^B K \F  T =∠∆ AABC a7rag ^I Kar   7g 7a g sW*%60=\^B K \F ABC ∆ aKrag Kar7g ^I ABC ∆ 8@K7a g 4.Củng cố: '%N6*%%+80%%12%,%%-%. '$/31%4&%.)!"5/6%,%%-%. 'I!.H=\^B K 7g  rt  u]  rv >7grv=!B t ` ] fPKar   7grv=!B 7 a g 5. Dă ̣ n do ̀ : 'N!8-*%%+/0%%1831%4%.)%,%%-%. 'N!8-/%%5!%*%60P> 'wH3:/;)%5P>&6!.HvJvT=\^B 'xG!>?H%.H)yI4.Hz