This math topic focuses on calculating the circumference of circles using the formula C = 2πr, where C represents circumference and r is the radius. The problems involve inserting given radius values (which are decimals or whole numbers) into the formula, with π approximated as 3.14. By correctly substituting the radius into the equation, students practice using the circumference formula in a straightforward application to enhance their understanding of circle geometry at an introductory level. Each problem presents multiple-choice answers, encouraging learners to perform correct arithmetic operations and select the accurate result.
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Given this information, what is the circumference of this circle