pi r square is the area of a circle.
http://wiki.answers.com/Q/What_is_Pie_R_Square

Pie is round, not square!
http://www.chacha.com/question/whatisthepieof...

The formula for the area of a circle is Area = πr^2, where r is the radius of the circle and π = 3.14. If you have a circle with radius of r = 3, then the area of the circle
http://answers.yahoo.com/question/index?qid=200904...

Rsquared is a statistic presented as a number between 0 and 100. The higher the Rsquared number your mutual fund has, the more it will behave like the S&P 500. If you own a
http://www.ehow.com/info_12099761_rsquaredinvesti...
