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Flanders Math Olympiad
2011 Flanders Math Olympiad
4
4
Part of
2011 Flanders Math Olympiad
Problems
(1)
ratio chasing with 2 intersecting cevians
Source: 2011 VWO Flanders MO p4
8/7/2020
Given is a triangle
A
B
C
ABC
A
BC
and points
D
D
D
and
E
E
E
, respectively on
]
B
C
[
] BC [
]
BC
[
and
]
A
B
[
] AB [
]
A
B
[
.
F
F
F
it is intersection of lines
A
D
AD
A
D
and
C
E
CE
CE
. We denote as
∣
C
D
∣
=
a
,
∣
B
D
∣
=
b
,
∣
D
F
∣
=
c
| CD | = a, | BD | = b, | DF | = c
∣
C
D
∣
=
a
,
∣
B
D
∣
=
b
,
∣
D
F
∣
=
c
and
∣
A
F
∣
=
d
| AF | = d
∣
A
F
∣
=
d
. Determine the ratio
∣
B
E
∣
∣
A
E
∣
\frac{| BE |}{|AE |}
∣
A
E
∣
∣
BE
∣
in terms of
a
,
b
,
c
a, b, c
a
,
b
,
c
and
d
d
d
https://cdn.artofproblemsolving.com/attachments/5/7/856c97045db2d9a26841ad00996a2b809addaa.png
ratio
geometry
Cevian