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Mathematics
Mathematics
Problem
In a circle with centre
O
O
O
, chords
A
B
AB
A
B
and
C
D
CD
C
D
are equal. If
∠
A
O
B
=
2
x
∘
\angle AOB = 2x^{\circ}
∠
A
O
B
=
2
x
∘
and
∠
C
O
D
=
5
x
−
39
∘
\angle COD = 5x - 39^{\circ}
∠
C
O
D
=
5
x
−
3
9
∘
, find
∠
C
O
D
\angle COD
∠
C
O
D
. a)
52
∘
52^{\circ}
5
2
∘
b)
65
∘
65^{\circ}
6
5
∘
c)
26
∘
26^{\circ}
2
6
∘
d)
39
∘
39^{\circ}
3
9
∘
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