Answer: C. 180º
Answer: (C) 180º
A diameter divides the circle into two semicircular arcs, and the measures of the two arcs add up to \(360^\circ\). Hence each semicircular arc has measure \(\dfrac{360^\circ}{2} = 180^\circ\).
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Doubtly AI
· 25 Oct 2026
AI-verified · Oct 2026
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