This interactive exercise focuses on working with the radius of various circles to find the circumference and area as well as challenging you to find the distance a square wheel travels around the track.

Explore everything about circles. Learn various parts of a circle like a diameter, radius, circumference, circles chord, tangent circles, major arc, segment, sector, and discover other interesting aspects of it. Try your hand at solving...

This lesson focuses on the characteristics of a circle including similarity, radius, circumference, and Pi. It provides formulas to determine the area of a circle, calculating Pi, and learning exercises throughout.

In this activity, students compute the circumference and area of circles. They understand that the ratio of the circumference to the diameter is a value called pi. [Requires Adobe Reader.]

This site has many useful formulas and examples relating to circles, including related definitions, circumference of a circle, area of a circle, length of a circular arc, area of a circular sector, equation of a circle in cartesian...

This WebMath site will assist with finding the radius, diameter, circumference, and area of a circle.

In this lesson plan, 7th graders use their knowledge of formulas to determine the area and circumference of a circle.

Discusses the radius, diameter, circumference, and area of a circle.

Learn about the circumference of a circle with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

A basic review of circles and how to calculate the circumference, radius, diameter, and area. Includes practice questions.

This mini-lesson explores the area of a circle. Provides a definition, examples, and practice questions with answers.

Do you need to learn about Pi, circumference, or the area of a circle or just have a quick refresher about them? This British web site will take you through the basics and offers a quick on-line test to help you check your understanding.

Practice interesting area and circumference problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Worksheets provide practice with finding the area or circumference of a circle and answer keys are provided. You can even create your own instructional activity or flashcards.

In this lesson, 7th graders will learn vocabulary associated with circles and use formulas to find the area and circumference of circles.

Get independent practice working with finding the circumference, area and radius of circles. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

At the end of this lesson plan about formulas, students will be able to identify and apply the correct formula for a given situation, solve for any unknown component of the formulas for perimeter, circumference, and area of regular and...

Practice finding the area or circumference of part of a circle. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice find the area and circumference, of parts of circles. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice problems finding area of parts of circles.

In this activity on circles, 7th graders will learn how to find the area and circumference of circles, semicircles, and compound shapes using formulas.

Try these challenge problems involving area and circumference.

A deep dive into the area and circumference of circles.

In this exercise, students practice problem solving the area and circumference of circles. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.