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Mathematics
Mathematics
Problem
In quadrilateral
A
B
C
D
ABCD
A
B
C
D
,
A
B
=
C
D
AB = CD
A
B
=
C
D
and
A
D
=
B
C
AD = BC
A
D
=
B
C
. Diagonal
A
C
AC
A
C
is drawn. Prove that
∠
B
A
C
=
∠
D
C
A
\angle BAC = \angle DCA
∠
B
A
C
=
∠
D
C
A
.
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