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Mathematics
Mathematics
Problem
Points P, Q and R lie on a circle with centre O. If
∠
P
O
Q
=
112
∘
\angle POQ = 112^{\circ}
∠
P
O
Q
=
11
2
∘
and
∠
Q
O
R
=
85
∘
\angle QOR = 85^{\circ}
∠
QO
R
=
8
5
∘
, what is the measure of arc PR? a)
197
∘
197^{\circ}
19
7
∘
b)
143
∘
143^{\circ}
14
3
∘
c)
163
∘
163^{\circ}
16
3
∘
d)
177
∘
177^{\circ}
17
7
∘
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