Area of an AnnulusDate: 10/13/2001 at 23:15:14 From: Cindy Subject: Geometry I wanted to know how you would find the area of an annulus. Date: 10/14/2001 at 12:54:18 From: Doctor Sarah Subject: Re: Geometry Hi Cindy - thanks for writing to Dr. Math. A ring, or annulus, with outer radius x and inner radius y, has area pi(x^2 - y^2) And see #15 at Circumference and Area of Circles, Part I - ICSE. Maths http://www.icsemaths.com/Part1-circumfe.htm (the answers are at the bottom of the page). - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
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