[Free Registration/Login may be required to access all resource tools.] Name the parts of a circle.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed quadrilaterals in circles.

[Free Registration/Login may be required to access all resource tools.] Find the radius or diameter of a circle given its area.

Understand the concept of circumference by learning the definition, circumference geometry definition, circumference equation, and circumference of a circle formula. Check-out the interactive simulation for better understanding and try...

For this task, students are asked to explain the formula for finding the circumference of a circle. Aligns with G-GMD.A.1.

This is where you can pick up some valuable pointers on how to find the circumference and area of a circle. There is also information on how to find the perimeter and area of a semicircle. When you finish working your way through the...

In this activity, students will learn the basic concepts of the circle. They explore the relationship between the diameter and the radius, and between the diameter and circumference of a circle. They also get familiar with the Greek...

Students find perimeters of rectangles and squares, as well as circumferences of circles. Students find areas of rectangles, squares, and circles. [Requires Adobe Reader.]

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.

This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of finding the circumference and area of circles.

Determine the circumference of a circle or simple arc lengths.

Students will discover how to estimate and measure the circumference and area of a circle.

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.]

The idea of perimeter can be applied not only to polygons but to circles as well. The same idea can be said for the area of a circle. (Continued. See "before the activity.") [Requires Adobe Reader.]

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

In this activity, students will measure round objects to determine the circumference and diameter, and use the data to explore geometric concepts of the circle with statistics.

This activity provides students an opportunity to explore the relationship between the diameter of a circle and its circumference. [Requires Adobe Reader.]

The Math Forum offers an archive of question and answer sessions on circles and how they relate to geometry.

A complete reference guide to circles including parts, angles, and arcs. It provides definitions and interactive activities that enhance further explanation.

For this task, students investigate and develop an understanding of the formula for the area of a circle. Aligns with G-GMD.A.1.

Learn about parts of a circle with this pictorial index. Click on the diagrams for more information. Includes links to related topics.

Find the area of a circle given its radius, diameter, or circumference. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Seventh graders will measure the circumference and diameter of round things in the classroom and discover the ratio pi. They will see that the ratio of a circle's circumference to its diameter can be used to solve for the circumference...

Twenty-five problems cover various circle activities. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check each step of your...