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Mathematics
Mathematics
Problem
In a circle,
A
B
AB
A
B
is a chord. Points
C
C
C
and
D
D
D
lie on the circumference on the same side of
A
B
AB
A
B
. a. (i) If
∠
A
C
B
=
42
∘
\angle ACB = 42^\circ
∠
A
C
B
=
4
2
∘
, find
∠
A
D
B
\angle ADB
∠
A
D
B
. b. (ii) The centre of the circle is
O
O
O
. Calculate
∠
A
O
B
\angle AOB
∠
A
O
B
.
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