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Mathematics
Mathematics
Problem
In a circle with centre
O
O
O
, chord
A
B
AB
A
B
is equal in length to chord
C
D
CD
C
D
. If
∠
A
O
B
=
82
∘
\angle AOB = 82^\circ
∠
A
O
B
=
8
2
∘
, find the measure of
∠
C
O
D
\angle COD
∠
C
O
D
.
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