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

There are three formulas that need to be used to solve this problem. The formula for the lateral area of a cylinder, the formula for the circular base of the cylinder, and then the formula for the surface area. It seems like quite a bit,...

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...

Cut up a circle and make a parallelogram! What? No way! Yes way! Watch the instructor illustrate just how to cut up the circle and get that parallelogram to then get the formula for the area of a circle. It really works! Base,...

The Math Buster goes out and demonstrates a real life example of calculating circumference by walking around the edge of a circle, and compares it to walking from the edge of the circle to the center point. It is a visual demonstration,...

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...

The Noon Day Project is a collaborative internet project for students to recreate Eratosthenes first measurement of the Earth's north-south circumference. Participate in the next project session, or review the data presented in the...

It's easy to find the circumference of a circle if you know the diameter. Just plug in its value into the formula for the circumference of a circle to get the answer. This tutorial shows you how. [3:28]

It's easy to find the circumference of a circle if you know the radius. Just plug the value for the radius into the formula and solve. This tutorial shows you how. [4:18]

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 shows an understanding of the sum of the interior angles of polygons, properties of parallelogram, lateral area of a cone, area of a kite, and circumference of a circle.

Proof of the formula relating the area of a triangle to its circumradius.

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]

Gain a basic understanding of circumference and area by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [7:55]

Gain a basic understanding of what P is by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [7:58]

This video demonstrates an understanding of perimeter, volume, surface area, area, and Pythagorean theorem.

This video will show you how to solve problems dealing with the area of a circle.

Video tutorial uses examples to introduce circles. [6:39]

This video explains how to use drawing tools on a computer to draw circles and their parts. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept. [5:59]

This video tutorial teaches you how to calculate the surface area and volume of cones. Just like pyramids and cylinders, there are formulas for surface area and volume of cones. Also included are questions on composite solids that...