Definition / Summary / How To / Steps
circumfrence: the outside of a circle multiplied by 3.14 or pi


Easy Problems
Area of a circle with the radius of 1 = 1 pi
The diameter is 26 what is the radius? answer is 13

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Medium Problems:

Find the circumference with a radius of 5 inches. answer- 31.4

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===Formulas Circumference 2pi * r

Area

pi * r2

Easy Problems Radius = 10 Circumference= 20 (10*2) Area = 100 (10*10)

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Medium Problems Radius= 50 Circumference= 100 (50*2) Area= 2,500 (50*50) ----

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Hard Problems Radius= 132 Circumference= 264 (132*2) Area= 17,424 (132*132)

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Pictures

Videos

http://www.schooltube.com/video/c88a58ab1e15c6500cf1/84b-Area-of-Circle-Ex-B
http://www.schooltube.com/video/d836fb2a4dc8661f3970/84a-Circumference-Ex-A