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r
3g
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r
4g
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r
5g
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r
6g
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r
7g
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r
8g
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r
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r
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r
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6g
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7g
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8g
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9g
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15
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6g
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7g
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8g
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9g
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4g
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y 3 4t
ì
ï
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ï
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ï
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5g
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2g
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4g
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5g
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6g
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BB ',
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1g
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2g
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1g
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CC ': 2x 2y 9 0+ - =
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BC : 5x 3y 2 0,- + =
BB ' : 4x 3y 1 0,- + =
CC ': 7x 2y 22 0+ - =
3g
BC : x y 2 0,- + =
BB ' : 2x 7y 6 0,- - =
CC ': 7x 2y 1 0- - =
4g
BC : 5x 3y 2 0,- + =
BB ' : 2x y 1 0,- - =
CC ': x 3y 1 0+ - =
1G+,12Y%3:@:V"Y:@G
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CC ' : 3x 12y 1 0- - =
2g
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CC ' : 3x y 1 0+ - =
1G+,12Y%3:@:V))Y"Y:
@G%*G 28
1g
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BM : x 2y 1 0,- + =
CN : y 1 0- =
2g
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BM : 3x 4y 9 0,- + =
CN : y 6 0- =
1G+,12Y:@%:V))Y"Y:@
G%W(%*G 28
1g
AB : x 2y 7 0,- + =
AM : x y 5 0,+ - =
BN : 2x y 11 0+ - =
2g
AB : x y 1 0,- + =
AM : 2x 3y 0,+ =
BN : 2x 6y 3 0+ + =
1G+,12Y:@%%)*%B"Y
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1g
AB : 2x y 2 0,+ - =
AC : x 3y 3 0,+ - =
( )
M 1;1-
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( )
M 3;0
3g
AB : x y 1 0,- + =
AC : 2x y 1 0,+ - =
( )
M 2;1
4g
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AC : 2x 6y 3 0,+ + =
( )
M 1;1-
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BM : 2x 3y 0+ =
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CN : x 2y 7 0+ + =
3g
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CN : 2x y 2 0- + =
19
4g
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CN : 5x 7y 20 0+ - =
!"#$%&'(%#)(*
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*.
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1
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&
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1
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&
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3g
1
x 5 t
d :
y 3 2t
ì
ï
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ï
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ï
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ï
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ï
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ï
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ï
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1
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d :
y 2 2t
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ï
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ï
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ï
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ï
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ï
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ï
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1
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d :
y 1
ì
ï
= +
ï
í
ï
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ï
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&
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6g
1
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&
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&
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&
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3g
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&
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: m 4 x 2m 3 y m 5 0D - + - + - =
4g
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&
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@:V4)iD)
1g
1
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2
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( )
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2g
1
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2
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3g
1
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2
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3
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4g
1
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2
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( )
3
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"Y:@:V$D)*:V$
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1
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2
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2g
1
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2
d : 5x 2y 4 0- + =
3
d song song d : 2x y 4 0- + =
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1
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2
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@G:V4)()>D)8
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3g
mx y 2m 1 0- - - =
4g
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20
1G+,18
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A 0;–1 , B 2;–3 , C 2;0
1g"Y:@G:V))Y2:@G:V2
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2g1BG:V))YiD)2G:ViD)2G
:V)
aiD)
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x 3y 0, 2x 5y 6 0- = + + =
23
( )
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Kg
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2g
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M 1; 5 , P –2; 9 , Q 3; – 2
+(,(-(#$!.(%#)(/
U<LGfCY:V$28
1g
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Ng
( )
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3g
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x 2t
M 4; 5 , d :
y 2 3t
ì
ï
=
ï
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í
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2 3
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UG<U:VW/
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D
2g1@AQ+,1T :@N%(!
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U$=U@AQ
3gU$=U@)> s3?PN:V44!
1
d : 3x 4y 6 0- + =
2
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1G+,1U$=UG+,128
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A –1;–1 , B 2;–4 , C 4;3
2g
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A –2;14 , B 4;–2 , C 5;–4
"Y:@:V$44G:V∆<L28
1g
: 2x y 3 0, h 5D - + = =
2g
x 3t
: , h 3
y 2 4t
ì
ï
=
ï
D =
í
ï
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ï
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3g
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4g
: x 2 0, h 4D - = =
"Y:@:V$448:V∆G+<L
?28
1g
( )
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2g
( )
: x 4y 2 0, A 2;3 , h 3D + - = - =
3g
( )
: y 3 0, A 3; 5 , h 5D - = - =
4g
( )
: x 2 0, A 3;1 , h 4D - = =
"Y:@:VD)+G,<L?28
21
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2g
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3g
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4g
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A 3; 0 , B 0; 4 , d 4=
"Y:@:VD)CG;)2n28
1g
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M 2; 5 , P –1; 2 , Q 5; 4
2g
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M 1; 2 , P 2; 3 , Q 4;–5
3g
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M 10; 2 , P 3; 0 , Q –5; 4
4g
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M 2; 3 , P 3;–1 , Q 3; 5
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?<28
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2g
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1:V
: x y 2 0D - + =
G
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O 0; 0 , A 2; 0 , B –2; 2
1g1B:V∆m%+,
2g1B?2+?9;U58:V
∆
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4gP∆2@C4$:V]<.C+m]
1
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4
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C 12;10 , C ;
5 5
æ ö
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ç
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ç
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ç
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<L
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3g@QRGG;):V
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5
13
!
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: 4x 3y 10 0D - - =
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2g
3x 4y 9 0, 8x 6y 1 0- - = - + =
Og
x 3y 6 0, 3x y 2 0+ - = + + =
4g
x 2y 11 0, 3x 6y 5 0+ - = - - =
1G+,1@/G<U:VWYG+,128
1g
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A –3;–5 , B 4;–6 , C 3; 1
2g
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A 1; 2 , B 5; 2 , C 1;–3
3g
AB : 2x 3y 21 0, BC : 2x 3y 9 0, CA : 3x 2y 6 0- + = + + = - - =
4g
AB : 4x 3y 12 0, BC : 3x 4y 24 0, CA : 3x 4y 6 0+ + = - - = + - =
0
22
U A:V
1g
x 2y 1 0, x 3y 11 0- - = + - =
2g
2x y 5 0, 3x y 6 0- + = + - =
3g
3x 7y 26 0, 2x 5y 13 0- + = + - =
4g
3x 4y 5 0, 4x 3y 11 0+ - = - + =
U45*G G+,128
1g
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A –3;–5 , B 4;–6 , C 3; 1
2g
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3g
AB : 2x 3y 21 0, BC : 2x 3y 9 0, CA : 3x 2y 6 0- + = + + = - - =
4g
AB : 4x 3y 12 0, BC : 3x 4y 24 0, CA : 3x 4y 6 0+ + = - - = + - =
1:V$∆@ A:V ?α28
1g
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0
d : 2mx m 3 y 4m 1 0, : m 1 x m 2 y m 2 0, 45+ - + - = D - + + + - = a =
2g
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0
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"Y:@:V$D)+%8:V∆ α28
1g
( )
0
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2g
( )
0
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3g
( )
0
A 2;5 , : x 3y 6 0, 60D + + = a =
4g
( )
0
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1@)>+,1T /
( )
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2g@%s3*@)>
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2:V
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