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

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

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...

Given a circle, students will construct a diameter of the circle. They will use the following theorem: In the same circle, if one chord is a perpendicular bisector of another chord, then the first chord is a diameter.

Practice problems finding radius and diameter of a circle.

This lab activity allows students to calculate the diameter of the moon using proportions. Also follow links to other NASA lesson plans.

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

This site shows what a diameter is, how to find one on a circle or a sphere, and provides the formula to find diameter of a circle or "the great circle of a sphere.

Find a quick, concise explanation of what the diameter of a circle is. An example is given and clearly explained.

In studying the solar system, young scholars compare the relative sizes of the sun and the moon, and experiment with angular diameter, apparent diameter and distance.

Practice finding the radius and diameter of a circle using both vocabulary and visuals. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice finding radius, diameter, and circumference. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

This multimedia site offers a beginner's guide to understanding the relationship between the diameter and circumference of a circle. This Learn Alberta site offers a video [1:44], interactive exercises and printable extended exercises.

How big is the Earth compared to the Sun? Is Mars bigger than the Moon? Seeing all bodies in the solar system larger than 200 miles in diameter side by side provides an excellent comparison and an interesting perspective.

The purpose of this task is for students to measure lengths to the nearest eighth and quarter-inch and to record that information in a line plot. Aligns with 4.MD.B.4 and CCSS.Math.Content.3.MD.B.4 Generate measurement data by measuring...

[Free Registration/Login may be required to access all resource tools.] Identify pi as the ratio of a circle's diameter to a circle's circumference.

In this video segment [3:10] from Cyberchase, the CyberSquad must find the exact center of a circle in order to save Motherboard.

In this lesson, middle schoolers explore circumference and diameter by creating an abstract design with circles. Media resources and teacher materials are included.

Mathworld states a brief description of a diameter. It also gives a two-dimensional and three-dimensional diagram for a diameter.

When hikers and skiers go into terrain with a risk of avalanches, they take safety equipment including avalanche rescue beacons. An avalanche rescue beacon sends and receives electromagnetic field signals that travel in circular...

Students show comprehension of advanced mathematics skills in Geometry. The questions check understanding on circles. Topics include diameters, angles, and finding the circumference.