Mathematics 0580 · IGCSE · Non-right-angled triangles

Non-right-angled triangles — practice question

The diagram represents triangle $PRQ$. $PQ = 18$ cm, $RQ = 13.5$ cm, and angle $RPQ = 42^{\circ}$. The diagram is NOT TO SCALE.
(main)[4]

Calculate the obtuse angle for $PRQ$.

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