In this figure, PQRS is a parallelogram, PS = PT and

In this figure, PQRS is a parallelogram, PS = PT and < PST = 55(^o). The size of <PQR is

  • A.
    125o
  • B.
    120o
  • C.
    115o
  • D.
    110o
  • E.
    10o
Correct Answer: Option D
Explanation

Both pairs of opp. angles are equal
< STP = 55(^o) – isosceles angle
< TSR = 55(^o) – alternate angle to < STP
Hence, < PSR = 55(^o) + 55(^o) = 110(^o)
(therefore) < PQR = 110(^o)

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