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International Contests
Tournament Of Towns
1985 Tournament Of Towns
(090) T1
(090) T1
Part of
1985 Tournament Of Towns
Problems
(1)
TOT 090 1985 Spring Train S1 AB=BC=1, <ABC=100^o, <CDA=130^o, BD=?
Source:
8/24/2019
In quadrilateral ABCD it is given that
A
B
=
B
C
=
1
,
∠
A
B
C
=
10
0
o
AB = BC = 1, \angle ABC = 100^o
A
B
=
BC
=
1
,
∠
A
BC
=
10
0
o
, and
∠
C
D
A
=
13
0
o
\angle CDA = 130^o
∠
C
D
A
=
13
0
o
. Find the length of
B
D
BD
B
D
.
geometry
angles