Points P, Q and R lie on a circle with centre O

MATHEMATICS · Single correct · CBSE · Mathematics · Circles · Circles

Problem

Points P, Q and R lie on a circle with centre O. If

\angle POQ = 112^{\circ}

and

\angle QOR = 85^{\circ}

, what is the measure of arc PR? (a)

197^{\circ}

(b)

143^{\circ}

(c)

163^{\circ}

(d)

177^{\circ}