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