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Mathematics
Mathematics
Problem
In a parallelogram
A
B
C
D
ABCD
A
B
C
D
, diagonal
B
D
BD
B
D
is drawn. Prove that
△
A
B
D
≅
△
C
B
D
\triangle ABD \cong \triangle CBD
△
A
B
D
≅
△
C
B
D
.
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