DIỆN TÍCH CÁC LOẠI TỨ GIÁC

  
 





 !" # $
 %&
'
()
*
+,-
'
#!
'
).
/
#$012 3
 4567 
 891!
/
#!
'
"#!


/
#!

i tâ
̣
p.
8NO!NP
'
#!
'
:
/
QR,STD
UP#!


/
",
'
)P:
'
!

:
O
/
P
/
!

>!
'
1>V

!

"81
PUPOV

!

L)P

#!
'
1!



!
.-
'
.
/
!

)P


/
:

-
'


:
/
,P>!
'
1>V


!N1

UV

P:
/
j&

>P
'
(P

L!


#!
'
!



!#!


i i iQ pq

S AB DE BC
m
= +
= + =
Bài 2
_! 1#]e_!`#r
Q.>$.d,12`_!``s^1#rt
1

!"0su 1Z6\`s^N1

µ
=
0
120B
"DN`
µ
A
hQt
1
"
Dv6
⊥
Z\,1!.2>Z6`
µ
A
hQtP

6
[\

i
.
i
.
HOẠT ĐỘNG CỦA GV & HS NỘI DUNG
l`E{
 # $NE 
1(a
l29
|Z6\
NXP6\hQ.
}~NxUC!1!`9Zh
t.
oN`s),! 1
D
E
H
C
B
A
89OMm3s>k ":
 >k .OM0#$12
5=j• >X # $>$!.
2
l .X!1_! # 
$>$!.2a
95P



[6
\1
Z6[\
h
6[
P
\[6h


[6hw[h\[
!Ue`\[hZ6hQ."1N`[h\[h.
>$
\h[l[\hg.

Z6\
h


GZ6l\6
h


GQlgphpgG.


3) 8=~ƒ_^ 9GHIJK53
8)P:
'

'

 9;:
/
2eOV, NO!NOc>XOV, #=ˆ
 TIẾN TRÌNH LÊN LỚP 
DE.,!#$F9,1L!

,-
'
!

#!
'
:
/

6$.M
1eNd_!)>$,‰ 5d
8,&1#0~NX#$=
sL!s2N3NXs)† .
2U$.
l3sP2U$.
l3s(2=j•#€s
lJEŠNE3sU$.#$
893sUP#0, #$)Uf
0AM=j•#€s
89u!<!"=j•#€s
Bài tập 19
02OV, s!9

2U$.
895P2#OM02OV
, ,P
95P2#OM0AM=
j•#€s
89C:2e>$20
_!.‹e
l3i3s0#$=
0UM{0
89OMm
AM=j•#€s
89u!<!"_^#$3
Bài tập 29
02OV, s!9
!iƒ„jGSƒjhgj

ljƒitt
2(1 3x) 2 3x 3(2x 1)
b) 7
5 10 4
− + +
− = −
5x 2 8x 1 4x 2
c) 5
6 3 5
+ − +
− = −
09
!iƒ„jGSƒjhgj


⇔Sjƒgtjƒ„jhƒStƒtƒt
⇔ƒqpjhƒSg
⇔jh
Ji9_^
V.Hướng dẫn về nhà:
l5‚.‚2•#]N€OVNOV2OV, >$2U$.2e#$=
,P
Bài tập về nhà: Gi¶i ph¬ng tr×nh:
a, 5(2x - 3) - 4(5x - 7) = 19 - 2(x + 11)
b, 17 - 14(x + 1) = 13 - 4(x + 1) -5(x - 3)
c,
i q 
Q
 i
x x− +
+ = −
ld,
iG i  S p q p
„  i „
x x x+ + −
+ = −
Tuần 23 Tên bài dạy: GIẢI PHƯƠNG TRÌNH CHỨA ẨN Ở MẪU.

I/Mục tiêu bài học:Œ!#$$)3s‚.9








-
*
!
/
P



!O
'
#OV

!


%&
'
()
*
+>=~>!
'
1!

!

#!
'
:
/


/
",
'
)P:
'
!

:O
/

P
/
!

>!
'
1>V

W,1(N1

1
/

UP#!

!

9
Ba

'
s!9
8)P:
'
PNP
'
(P
/
j!

N
/



!OV,-
'
!W.:*O



!
!

!>P



!OV,-
'

x x
x


#r
9JE0#$12$)"!0U$. a
A9U=OV, >M>]0
#r9
2
2
2 3 2
2
4
x x
x

=

W,0OV
, >o!U=NOc
83UP#00"UMU$.>$1
>
8N:OVN^>M2:#
>$
A9OV2O:
!"!0U=OV, #Exs#r
jlhjli
tjhz
D`2,x$1_!j!.b
8=)h

x x x x
x x Khoõng
8:
/
)h
+
+ =

2
5 2 2 1 3
). 1 (ẹKXẹ: x 1)
2 2 2 1
x x x x
c
x x
( )
( )
( )
( )
( ) ( )

+
+ = +

2
(2 1) 1 2 1
2 5 2( 3)
2 1 2 1 2 1 2 1
x x x
x x x

+ + = +
+ + + + =
= =
2 2 2
5 2 3 1 3 1 1 2 1 3
15 5 6 2 3 3 3 2 6 0
5
22 10 ( )
11
5
Vaọy S =
11
x x x x x x
x x x x x x x
x x nhaọn
Ba

i
2
(BT 39/tr10-SBT)Tỡm x tha món:
2
2
2 3 2
). 2
4
x x
a