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Mathematics
Mathematics
Problem
In figure, D and E are points on
A
B
AB
A
B
and
A
C
AC
A
C
respectively, such that
D
E
∥
B
C
DE \parallel BC
D
E
∥
B
C
. If
A
D
=
1
3
B
D
AD = \frac{1}{3}BD
A
D
=
3
1
B
D
,
A
E
=
4.5
cm
AE = 4.5\ \text{cm}
A
E
=
4.5
cm
, find
A
C
AC
A
C
.
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