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Determine the size of one interior angle in a regular $9$-sided polygon.
Mathematics 0580 · IGCSE · Angles
Angles — practice question
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “M1: correct use of $180 - \frac{360}{9}$ or $(9-2)\times\frac{180}{9}$” …
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