A polygon has \(n\) sides. Two of its exterior angles are \(50^\circ\) and \(70^\circ\), and the remaining exterior angles are each \(16^\circ\). Find the value of \(n\).[2]
The diagram shows one interior angle of each of three regular polygons, \(A\), \(B\) and \(C\). The polygons fit together at point \(O\), leaving a space marked by angle \(x\). \(A\) is a regular nonagon, \(B\) is a square and \(C\) is an equilateral triangle. Find angle \(x\).[2]
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