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Mathematics
Mathematics
Problem
Chords
A
B
AB
A
B
and
C
D
CD
C
D
of a circle with centre
O
O
O
are equal. Prove that
∠
A
O
B
=
∠
C
O
D
\angle AOB = \angle COD
∠
A
O
B
=
∠
C
O
D
.
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