# PQRS is a cyclic quadrilateral, such that ratio of measures of ∠P, ∠Q and ∠R is 1:3:4

PQRS is a cyclic quadrilateral, such that ratio of measures of ∠P, ∠Q and ∠R is 1:3:4 then the measure of ÐS is

(a) 36^{o}

(b) 108^{o}

(c) 144^{o}

(d) 72^{o}

in a cyclic quadrilateral ,we know some of opp angles wil b 180 degree..so calculating this way..getting answer 72 degree.