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Byju's Answer
Standard IX
Mathematics
Proportion in Similar Triangles
For ABC and...
Question
For
△
A
B
C
and
△
X
Y
Z
,
△
A
B
C
↔
△
X
Y
Z
is a similarity. If
A
B
4
=
B
C
6
=
C
A
3
,
A
C
=
3
,
X
Y
=
5
, find
Y
Z
and
X
Z
.
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Solution
G
i
v
e
n
t
h
a
t
△
A
B
C
∼
△
X
Y
Z
A
B
4
=
B
C
6
=
A
C
3
=
k
∴
A
B
=
4
k
;
B
C
=
6
k
;
A
C
=
3
k
X
Y
=
5
⟹
A
B
X
Y
=
B
C
Y
Z
⟹
4
k
5
=
6
k
Y
Z
∴
Y
Z
=
(
6
k
×
5
)
4
k
∴
Y
Z
=
15
2
=
7.5
A
B
X
Y
=
A
C
X
Z
i
m
p
l
i
e
s
4
k
5
=
3
k
X
Z
∴
Y
Z
=
7.5
&
X
Z
=
3.75
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0
Similar questions
Q.
△
A
B
C
is similar to
△
X
Y
Z
by
S
S
S
similarity. If in
△
A
B
C
,
A
B
=
12
,
B
C
=
8
,
A
C
=
6
and in
△
X
Y
Z
,
X
Y
=
6
,
Y
Z
=
4
. Find the value of
X
Z
Q.
△
A
B
C
is similar to
△
X
Y
Z
by
S
A
S
similarity. If in
△
A
B
C
A
B
=
12
,
B
C
=
8
,
∠
B
=
60
o
and in
△
X
Y
Z
X
Y
=
3
,
∠
Y
=
60
o
. Find the value of
Y
Z
Q.
In triangle ABC, AB = 2.2 cm, BC = 1.5 cm and AC = 2.3 cm. In triangle XYZ, XY = 4.4 cm, YZ = 3 cm and XZ = 4.6 cm. Find the ratio AB : XY, BC : YZ, AC : XZ. Are the lengths of corresponding sides of
△
ABC and
△
XYZ are in proportion?
Q.
In
△
ABC and
△
XYZ, if
∠
ABC =
∠
X
Y
Z
=
90
∘
, AC = XZ and BC = YZ, then by which postulate is
△
A
B
C
≅
△
X
Y
Z
?
Q.
Δ
A
B
C
∼
Δ
X
Y
Z
AB: XY=2:3 if BC=5cn find YZ.
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