Comments on: Area of circle as fraction of area of square? http://www.thearealist.com/circle-area/area-of-circle-as-fraction-of-area-of-square Fri, 03 Feb 2012 13:07:59 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: kbphilips http://www.thearealist.com/circle-area/area-of-circle-as-fraction-of-area-of-square/comment-page-1#comment-1821 kbphilips Tue, 09 Feb 2010 19:38:59 +0000 http://www.thearealist.com/circle-area/area-of-circle-as-fraction-of-area-of-square#comment-1821 Calculate the square root of the area of the square. square root of 196 = 14. divide that by two to get the radius of the circle 14/2 = 7 use pi*r^2 to get the area of the circle. pi=3.14 r = 7, r squared = 49 49*3.14 = 153.86. The reason this isn't 153.94 is because pi isn't exactly 3.14 if you use pi to a few more digits then you'll get 153.94. i.e. 49*3.1415926 = 153.94 approximately.<br><b>References : </b><br> Calculate the square root of the area of the square.

square root of 196 = 14.

divide that by two to get the radius of the circle
14/2 = 7

use pi*r^2 to get the area of the circle.
pi=3.14
r = 7, r squared = 49

49*3.14 = 153.86. The reason this isn’t 153.94 is because pi isn’t exactly 3.14 if you use pi to a few more digits then you’ll get 153.94. i.e. 49*3.1415926 = 153.94 approximately.
References :

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