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{ "quality": "blurry", "question_count": 1, "skills_matched": [ "step_cot", "blank_filling_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [], "new_concepts": [ "Circumference Formula", "Area of a Circle" ], "current_concepts": [ "Circumference Formula", "Area of a Circle" ] } ## Find the radius from the circumference $$ \begin{aligned} C &= 2\pi r \ 26\pi &= 2\pi r \ r &= 13 \end{aligned} $$ ## Calculate the area of the circle $$ \begin{aligned} A &= \pi r^2 \ A &= \pi (13)^2 \ A &= 169\pi \end{aligned} $$ The circumference of a circle is $26\pi\text{ ft}$. What is the area of the circle? Write your answers using 'pi' with no spaces. $A_{\text{circle}} =$ 169pi $\text{ft}^2$ { "subject": "Mathematics", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Mathematics", "Geometry", "Area of a Circle" ] }

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Find the radius from the circumference

Calculate the area of the circle

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