Khan Academy
Khan Academy: Perpendicular Bisectors: Area Circumradius Formula Proof
Proof of the formula relating the area of a triangle to its circumradius.
Sophia Learning
Sophia: Terms Relating to Circles
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.
Sophia Learning
Sophia: Circle Vocab 1
Parts of a circle are defined in this lesson. Take a quiz to assess learning.
Virtual Nerd
Virtual Nerd: What Is Pi?
Take a look at this tutorial to learn about the irrational number pi. [4:41]
Math Antics
Math Antics: Circles: Circumference and Area
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]
Math Antics
Math Antics: Circles: What Is Pi?
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]
Khan Academy
Khan Academy: Geometry: Area, Circumference, Volume
This video demonstrates an understanding of perimeter, volume, surface area, area, and Pythagorean theorem.
Khan Academy
Khan Academy: Circumference and Area of Circles: Area of a Circle
This video will show you how to solve problems dealing with the area of a circle.
Art of Problem Solving
Art of Problem Solving: Introduction to Circles
Video tutorial uses examples to introduce circles. [6:39]
Loyola University Chicago
Math Flix: Illustrating Circle Vocabulary on the Computer
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]
Study Pug
Study Pug: Surface Area and Volume of Cones
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...
Other
Mario's Math Tutoring: Act Math 21 Concepts to Boost Your Score
A video [48 mins, 48 sec] explaining 21 different math concepts to help students prepare for the ACT including; circumference; averages; probability; multiplication counting principle; functions; circles; percentages; factoring; rules of...
Khan Academy
Khan Academy: Circle Theorems Harder Example
The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a harder Circle theorems problem.
Khan Academy
Khan Academy: Circle Theorems Basic Example
The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a basic Circle theorems problem.
Khan Academy
Khan Academy: Ca Geometry: Area, Pythagorean Theorem
26-30, area, circumference, pythagorean theorem.
Khan Academy
Khan Academy: Ca Geometry: Area, Circumference, Volume
Geometry video with a focus on area, circumference and volume.
Sophia Learning
Sophia: Measuring a Curved Distance: Lesson 3
In this lesson, students are shown how to measure a curved distance. It is 3 of 9 in the series titled "Measuring A Curved Distance."
Sophia Learning
Sophia: Measuring a Curved Distance: Lesson 2
In this lesson, students are shown how to measure a curved distance. It is 2 of 9 in the series titled "Measuring A Curved Distance."
Shmoop University
Shmoop: Attributes of Circles
This video explains circumference, radius and diameter in an appealing way for students to understand.