Mathematics 0580 · IGCSE · Non-right-angled triangles

Non-right-angled triangles — practice question

A triangle $PQR$ is illustrated, NOT TO SCALE. $PQ = 2.8$ cm, $QR = 8.3$ cm, and the angle at $Q$ is $79^\circ$.

(a)[2]

Calculate the area of triangle $PQR$.

(b)[2]

Calculate the area of this enlarged triangle.

Worked solution & mark scheme

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