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Mathematics
Mathematics
Problem
In a circle with centre
O
O
O
, chord
A
B
AB
A
B
subtends an angle of
30
∘
30^{\circ}
3
0
∘
at a point
C
C
C
on the circle. What is
∠
A
O
B
\angle AOB
∠
A
O
B
? a)
30
∘
30^{\circ}
3
0
∘
b)
60
∘
60^{\circ}
6
0
∘
c)
45
∘
45^{\circ}
4
5
∘
d)
90
∘
90^{\circ}
9
0
∘
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