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Math Open Reference
Math Open Reference: Circles
A complete reference guide to circles including parts, angles, and arcs. It provides definitions and interactive activities that enhance further explanation.
Math Open Reference
Math Open Reference: Pi
Learn about Pi with this helpful reference tool. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.
Curated OER
Web Math: Find Out Things About Circles
WebMath offers a great site for students to practice finding the diameter, area and circumference of a circle.