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m9 similar figures
Contributed by: Childress
SAME SHAPE--
corresponding-angles are same size-congruent 
SIMILAR FIGURES
SIDES--corresponding--form a proportion
∆CDG∿∆ART
symbol for similar
C
turn the same way so
corresponding angles & sides match up
D
G
∆CDG∿∆ART
A
R
T
C
angles match up
D
G
∆CDG∿∆ART
A
R
T
corresponding sides match up
C
D
G
∆CDG∿∆ART
A
R
T
B
BN
NH
N
BH
H
∆BNH∿∆GEF
G
?
E
?
F
?
⊾B
⊾N
⊾H
SIMILAR FIGURES
A
C
D
B
trapezoid ADBC∿trapezoid RKLA
R
?
A
?
AD
=
BD
L
?
K
?
=
CB
=
AC
SIMILAR FIGURES
∆YBQ∿∆LGT
⊾Y
BQ
⊾Q
⊾GT
?
⊾T
?
⊾L
?
QY
BY
⊾B
TL
?
LG
?
⊾G
?
SIMILAR FIGURES--turn em the same
match up the angles
E
T
CB
?
ET
=
WE
AC
?
=
W
WT
AB
?
A
∆TEW∿∆
C
B
SIMILAR FIGURES--turn em the same
match up the angles
E
T
B
?
C
?
A
?
W
A
DRAW IT TURNED
C
B
SIMILAR FIGURES--turn em the same
match up the angles
E
T
B
5
C
10
45
A
W
5
ET
ET=
=
NO ROUNDING
45
10
SIMILAR FIGURES--turn em the same
match up the angles
E
T
B
C
A
W
⊾E=20
⊾A=
60
W
Y
25
30
SIMILAR FIGURES
T
45
R
C
A
AB
60
=
D
5
30
AB=
5
B
60
W
Y
25
30
SIMILAR FIGURES
T
45
R
C
A
AC
25
=
D
5
30
AC=
5
B
60
W
Y
25
30
SIMILAR FIGURES
T
45
R
C
A
CD
45
=
D
5
30
CD=
5
B
exact
W
Y
60
SIMILAR FIGURES
T
R
C
A
⊾R=
angles in a quadrilateral
add up to 3600
⊾B=
D
B
A
F
⊾F=350
⊾K=830
H
SIMILAR FIGURES
⊾H-->⊾
⊾F-->⊾
⊾A=
⊾R-->⊾
⊾M=
K
R
M
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