The angles formed by the rays PS, PR and PQ are
∠QSR, ∠RPS and ∠QPS
∠QPR, ∠RPR and ∠QPS
∠QPR, ∠RPS and ∠QRS
∠QPR, ∠RPS and ∠QPS
While naming the angles we write the vertex point as the middle letter. Hence ∠QPR, ∠RPS, and ∠QPS are the three angles formed by the rays PS, PR and PQ.
PQRS is a parallelogram whose diagonals intersect at M.if ∠PMS=54∘, ∠QSR=25∘ and ∠SQR=30∘ ;find : (i) ∠RPS (ii) ∠PRS (iii) ∠PSR.