Mathematics 0580 · IGCSE · Non-right-angled triangles

Non-right-angled triangles — practice question

Triangle $PQR$ is drawn here (not to scale). Given $PQ = 10$ cm and $PR = 9$ cm, the area of triangle $PQR$ is $38.5\,\text{cm}^2$.
(main)[6]

Calculate the value of $QR$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Area correctly obtained using $\frac{1}{2}ab\sin P$” …

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