Mathematics 0580 · IGCSE · Non-right-angled triangles

Non-right-angled triangles — practice question

A triangle is drawn with one side measuring 8 cm, the base measuring 9 cm, the angle at the top equal to $100^\circ$, and the lower-right angle marked as $x^\circ$. The figure is not drawn to scale.
(a)[3]

Calculate $x$.

(b)[3]

Calculate the triangle's area.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$61.1$ or $61.08$–$61.09\ldots$” …

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