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.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.