PQRS is a quadrilateral. RST forms a straight line. The diagram marks the angles at R, Q and P as $73^{\circ}$, $129^{\circ}$ and $75^{\circ}$ respectively.
(main)[2]
Determine angle $PST$.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct working: $360 - (73 + 129 + 75)$” …