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.

Practice problems finding area of parts of circles.

A practice quiz on calculating the area of a circle. Includes hints.

Practice finding the area of circle.

[Free Registration/Login may be required to access all resource tools.] In this lesson students find the diameter or radius of a circle given the circumference. Students examine guided notes, review guided practice, watch instructional...

[Free Registration/Login may be required to access all resource tools.] In this lesson students find the diameter or radius of a circle given its circumference. Students examine guided notes, review guided practice, watch instructional...

Brush up on your math skills relating to the circumference of circles of measurement then try some practice problems to test your understanding.

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.

Gain an understanding of how to find the diameter of a circle by viewing an example and a video lesson. [1:01]

Brush up on your math skills relating to the area of circles then try some practice problems to test your understanding.

Find a quick, concise explanation of circumference. The formula for finding the circumference of a circle is explained.

Definition of circumference. Click the "here's more" link to learn more about a circle; its radius and diameter, area, lines, slices and common sectors.

Use this circle calculator to find the area, circumference, radius, or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.

This site from Mathworld provides a wealth of information about circles is presented. The information ranges from the basics--radius, circumference, etc.--to advanced concepts--equations in polar and pedal coordinates, etc.

This site provides the formula for circumference. Links are provided.

Lesson presents definitions of terms associated with circles and helps students learn to use a compass to draw circles and simple circle designs.

Basic useful information regarding circles is provided.

A lesson focusing on the area of polygons and the circumference of circles. Engaging, interactive practice worksheet, lesson plan, and related classroom activity complete this lesson.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed angles and how to apply them.

This activity provides an opportunity for students to explore the ratio of the circumference of its circle to the length of its diameter in order to generalize the ratio of pi. [3:14]

[Free Registration/Login Required] This flipchart reviews basic geometric forms in nature and real objects. Students are then given opportunities to find the area of circle and parts of a circle, given the radius and/or diameter of the...

[Free Registration/Login Required] Students will determine the circumference of circles by moving smaller circle units. Click challenge me to answer practice questions and click learn more to watch a video.

[Free Registration/Login Required] Sudents use circle units to explore circumference in a big circle. Click challenge me to answer practice questions and click learn more to watch a video.

In this lesson plan, 7th graders determine the circumference and area of a circle.