« Looking for a fun latino hangout in Raleigh triangle area?
How can I found out list of major employers in a particular area that I never visit.? »

Area of circle as fraction of area of square?

The area of the square is 196cm squared. The area of the circle is 153.94cm squared. I need to know how to calculate what fraction the area of the circle is of the area of the square.

Help ?

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.

This entry was posted on Tuesday, February 9th, 2010 at 9:21 am and is filed under circle area. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “Area of circle as fraction of area of square?”

  1. 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 :

Leave a Reply