In this figure, PQRS is a parallelogram, PS = PT and < PST = 55o. The size of <PQR is
125o
120o
115o
110o
10o
Correct answer is D
Both pairs of opp. angles are equal
< STP = 55o - isosceles angle
< TSR = 55o - alternate angle to < STP
Hence, < PSR = 55o + 55o = 110o
∴ < PQR = 110^o
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