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Mathematics
Mathematics
Problem
In a circle,
∠
P
Q
R
\angle PQR
∠
P
QR
formed by chord
P
R
PR
P
R
at point
Q
Q
Q
on the circumference measures
42
∘
42^{\circ}
4
2
∘
. Determine the corresponding central angle
∠
P
O
R
\angle POR
∠
P
O
R
, where
O
O
O
is the centre of the circle.
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