PPP, Q Q\,Q and R R\,R are points on the circumference of a circle, centre OOO. SQ SQ\,SQ and SR SR\,SR are tangents to the circle from an external point SSS.
Angle OSR=24∘OSR = 24^\circOSR=24∘
Find the size of angle QPRQPRQPR.
Give reasons for each stage of your working.
