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Find the value of $y$.
Mathematics 0580 · IGCSE · Angles
Angles — practice question
The diagram represents a quadrilateral whose interior angles are $49^{\circ}$, $28^{\circ}$, $138^{\circ}$ and $y^{\circ}$. The figure is not drawn to scale.
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This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate angle calculation using a reflex-angle or equivalent approach” …
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