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Mathematics
Mathematics
Problem
In
△
A
B
C
\triangle ABC
△
A
B
C
and
△
D
E
F
\triangle DEF
△
D
E
F
,
∠
A
=
∠
D
\angle A = \angle D
∠
A
=
∠
D
. If
A
B
=
3
x
cm
AB = 3x\,\text{cm}
A
B
=
3
x
cm
,
A
C
=
5
x
cm
AC = 5x\,\text{cm}
A
C
=
5
x
cm
,
D
E
=
9
cm
DE = 9\,\text{cm}
D
E
=
9
cm
and
D
F
=
15
cm
DF = 15\,\text{cm}
D
F
=
15
cm
, find the value of
x
x
x
so that the two triangles are similar.
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