Explore the mathematical symmetries of quilts in this featured activity and check out our activities database for other interesting ideas for your math circle to try.

A circle is easy to make: Draw a curve that is radius away from a central point. And so: All points are the same distance from the center.

A circle is a 2-dimensional closed shape that has a curved side whose ends meet to form a round shape. Learn about circles with concepts, properties, and examples.

Join Math Circles, an after school enrichment math program designed to promote mathematical thinking, communication, and problem-solving abilities for Grade 5-12 students. Develop key competencies …

Circle worksheets, videos, tutorials and formulas involving arcs, chords, area, angles, secants and more.

Math circles are a growing phenomenon in math education around North America. Inspired by Eastern European teaching models, math circles often take a problem-discussion approach to teaching and …

Explore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.

They originated in Hungary over a century ago and quickly spread throughout Eastern Europe and Asia. These circles have played a crucial role in nurturing many great scientists in mathematics and other …

Here you will learn about the different parts of a circle including how to identify the key parts of a circle, properties of circles, circle formulas such as circumference and area, and how to solve various circle …

The Geometry of Circles - Cool Math has free online cool math lessons, cool math games and fun math activities. Really clear math lessons (pre-algebra, algebra, precalculus), cool math games, online …