cbicon.png CALCULUS Understanding Its Concepts and Methods

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Circle, Radius, Circumference, Area of circle

A circle consists of all points that are fixed distance (the radius) from some point (the center).
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D = 2r

Example: The circle with radius 5 has diameter D = 2 x 5 = 10 , circumference C = 10p ≈ 31.416 and area A = p × 52 = 25p ≈ 78.54.


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Copyright © 2006 Darel Hardy, Fred Richman, Carol Walker, Robert Wisner. All rights reserved. Except upon the express prior permission in writing, from the authors, no part of this work may be reproduced, transcribed, stored electronically, or transmitted in any form by any method.

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