In this program we explore the properties of circles. We do this in the context of two real-world applications.

We visit Chaco Canyon in New Mexico to explore the circular kivas and in the process discover how circular buildings have been used to study the heavens.

The Roman Coliseum is a large elliptical structure. Yet, the Romans likely used circular arcs to build it.

The Roman Pantheon is a domed structure that shows a keen awareness of the position of the sun throughout the year.

Use this math game to review circles. This is a Memory-style game in which students must remember the location of pairs of identical images.

This interactive crossword puzzle tests knowledge of key terms on the topic of circles.

January 2014. In this issue of Math in the News we examine the Polar Vortex.

This set of tutorials provides 23 examples of solving for the area and circumferences of circles and sections of circles.

In this activity, learn about the architecture of the Roman Colosseum.

In this activity, learn about the architecture of the Roman Pantheon.

This is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions of geometric theorems and postulates.

This is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.

This is part of a collection of definitions of geometric theorems and postulates.

This is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.

This is part of a collection of definitions of geometric theorems and postulates.

This is part of a collection of definitions of geometric theorems and postulates.

This is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.

This is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics.