Mathematics 0580 · IGCSE · Circle theorems I

Circle theorems I — practice question

The figure represents a cyclic quadrilateral. The angles are marked as $(4x - 87)^\circ$, $(x + 60)^\circ$, $2x^\circ$ and $y^\circ$.

(main)[4]

Determine the value of $y$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate simultaneous-equations method” …