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{ "quality": "blurry", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Circumference Formula" ], "new_concepts": [], "current_concepts": [ "Circumference Formula", "Parts of a Circle" ] } ## Identify the geometric representation of the physical scenario $$ \begin{aligned} &\text{Radius } (r) = 40\text{ m (distance from center to edge)} \ &\text{Distance in one complete rotation} = \text{Circumference of the circle } (C) \end{aligned} $$ ## Select the appropriate formula for circumference $$ C = 2\pi r $$

(A) $C = \pi d$

(B) $A = \pi r^2$

(C) $C = 2\pi r$

(D) $C = 2\sqrt{\pi A}$

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Geometry", "Circumference Formula" ] }

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Identify the geometric representation of the physical scenario

Select the appropriate formula for circumference

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