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Problems
Mathematics
Mathematics
Problem
Points
A
,
B
,
C
A, B, C
A
,
B
,
C
and
D
D
D
lie on a circle in that order. Chord
A
D
AD
A
D
subtends
∠
A
B
D
\angle ABD
∠
A
B
D
at
B
B
B
and
∠
A
C
D
\angle ACD
∠
A
C
D
at
C
C
C
. If
∠
A
B
D
=
38
∘
\angle ABD = 38^{\circ}
∠
A
B
D
=
3
8
∘
, calculate
∠
A
C
D
\angle ACD
∠
A
C
D
.
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