Pie is great for finding pi. A short video shows how to use real pies to calculate pi. The method involves laying out pies along the circumference and along the diameter of a circle, and then finding the ratio of the number of pies.

Understanding the basic of circles is as easy as pi. The resource introduces the definition of a circle along with its dimensions, circumference, diameter, and radius. Using graphics, the video shows the approximation of pi and how to...

Don't go around and around, help your class determine amounts around and in a circle with a video that connects circumference to the perimeter or the distance around an object. The resource includes 14 questions dealing with circles and...

Apple, cherry, pecan, or circumference: so many different uses for pi! Delve into the calculations relating to the circumference of a circle. The instructor applies the circumference formula to three different types of problems.

A circle is a set of all the points that are equal distance from a center point. Learn the definition of some of the terms that are associated with a circle: diameter, radius, chord.

The teacher diagrams and explains the different terms of what comprises a sphere. Follow along and learn about the: radius, diameter, great circle, center, and hemisphere.

The teacher diagrams and explains the different terms of what comprises a sphere. Follow along and learn about the: radius, diameter, great circle, center, hemisphere

Before you can do anything with circles, you need to know the parts of the circle. Viewers of a short video see how to label relevant information about a circle. The resource covers radius, diameter, circumference, chord, tangent, arc,...

There are actually two formulas to find the circumference of a circle. One formula is based on knowing the diameter of the circle, and the other is based on knowing the radius of the circle. The instructor illustrates both formulas. She...

There are two formulas that can be used to find the circumference of a circle. Choose the appropriate formula depending on the given value in the problem. After selecting the correct formula, solve the problem using 3.14 as an estimation...

Do you know the formula to find the area of a circle? Do you know the value of pi? Do you know what the relationship is between diameter and radius? Yes? Then you can solve this problem. If your scholars don't know this formula then this...

What do a secant, chord, diameter, and radius all have in common? They are all components or measurements of a circle! This clip quickly defines each of these terms using verbal, written, and diagram examples.

Middle school mathematicians might be able to follow as Mr. Vander Heuvel explores the relationship between circumference and diameter. The mystery comes in when he uncovers that for every increased increment of one unit in diameter, the...

Formally defines a circle and different parts of a circle. Identifies the proper notation for naming different parts of a circle. [11:12]

Given this lesson and either the diameter or radius of a circle, you'll be able to calculate the other measure. It is 3 of 10 in the series titled "Converting Between Diameter and Radius." [2:06]

The circumference of a circle is the distance around that circle. Take a look at this tutorial to discover the formulas for the circumference of a circle. [4:22]

Identifies and labels basic parts of a circle: center, diameter, radius, and circumference. This video also appears in the Geometry: Circles strand. [2:01]

This video tutorial demonstrates how to find the area of a circle. The lesson includes detailed examples.

Explore the parts of a circle then test your knowledge with a quiz.

This video lesson demonstrates how to find the slant height of a right cone. Students can check their understanding with an assessment. [6:18]

This video tutorial demonstrates how to calculate the volume and surface area of a sphere. The lesson includes four videos with detailed examples using the formulas for volume and surface area. [Video tutorial lengths total 17:16]

This lesson will define the terms center, diameter, radius, chord, circumference, and pi. Students can watch a video tutorial and then take an online quiz.

Parts of a circle are defined in this lesson. Take a quiz to assess learning.

Take a look at this tutorial to learn about the irrational number pi. [4:41]