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Problems
Contests
National and Regional Contests
Azerbaijan Contests
Azerbaijan Team Selection Test
Azerbaijan IMO TST 2016 First Round
2
2
Part of
Azerbaijan IMO TST 2016 First Round
Problems
(1)
Azerbaijan Team Selection Test 2016 First Round
Source: Azerbaijan Team Selection Test 2016 First Round
10/20/2015
A
B
C
ABC
A
BC
be atriangle with sides
A
B
=
20
AB=20
A
B
=
20
,
A
C
=
21
AC=21
A
C
=
21
and
B
C
=
29
BC=29
BC
=
29
. Let
D
D
D
and
E
E
E
be points on the side
B
C
BC
BC
such that
B
D
=
8
BD=8
B
D
=
8
and
E
C
=
9
EC=9
EC
=
9
. Find the angle
∠
D
A
E
\angle DAE
∠
D
A
E
.
geometry