Learn how to calculate the circumference of a circle also known as a perimeter of a circle. Find out what radius and diameter are and how to find their values. There are links to eThemes resources on perimeter and pi number. Includes an animation, interactive exercises, quizzes, and worksheets.
Learn the definition of a circumference and how to calculate its value. Select the letter-link "Cc" and click on the word "Circumference" to view the formula and try an online circumference calculator.
Learn the constant number Pi = 3.14. Find out why it is celebrated on March 14th every year. Discover why this number is considered to be a mysterious and fascinates some mathematicians. Learn how to calculate the number and use it for solving problems and equations. Includes animations, word problems, lesson plans, crafts, trivia, and quizzes.