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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
40
∘
40^{\circ}
4
0
∘
at the centre, while chord
C
D
CD
C
D
subtends an angle of
70
∘
70^{\circ}
7
0
∘
at the centre. Which chord is longer? a)
A
B
AB
A
B
and
C
D
CD
C
D
\text{ are equal} b)
C
D
CD
C
D
c) \text{The relation cannot be determined} d)
A
B
AB
A
B
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