This math topic involves computing the circumference of a circle using the radius provided in each question, emphasizing mental calculation by approximating π as slightly more than 3. The problems are designed to enhance understanding of the relationship between a circle's radius and its circumference within the broader context of introductory geometry focused on circle measurements. Each exercise offers multiple-choice answers, encouraging practice in accurate arithmetic operations and estimation involving π. This set of exercises is part of a foundational unit in geometric principles concerning circular shapes.
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Find the circumference without using a calculator. Remember that π is just a bit more than 3.
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