Radius of a PizzaDate: 8/27/96 at 3:56:15 From: Chuck Francis Subject: Radius of a Pizza with Area... If a pizza has an area of 30 inches square, what is its radius? What are the steps in solving this problem? Date: 8/27/96 at 4:33:48 From: Doctor Mike Subject: Re: Radius of a Pizza with Area... Hello, This is just what I need; a late-night pizza question! Just about the most famous math formula is known as "pie are square", or seriously, "The area of a circle is pi times the square of the radius length, or A = pi*r^2." You know that the area is 30 square inches, so 30 = pi*r^2. This is an equation in the unknown length r. Divide both sides of the equation by pi to get r^2 is 30/pi which is about 30/3.1415926535898 which is in turn about 9.5492966. Then r is the square root of this, which comes out to approximately 3.09 inches. Hey! This must be a Personal Pan Pizza (c) which is not big enough to share with me. I'm going off to get a snack. G'nite. I hope this helps. -Doctor Mike, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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