PRE-ALGEBRA
Lesson 136 of 171

PERIMETER AND CIRCUMFERENCE
Circumference
Students learn that the circumference of a circle is the distance around the circle, and the formula for the circumference of a circle is 2 times pi times the radius of the circle. Pi is the ratio of the circumference to the radius, which is approximately 22/7 or 3.14. So a circle with  more...
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