The formula to get the area of a circle (R" being the radius of the circle) Radius means the distance from the center of the circle to the edge.
http://wiki.answers.com/Q/What_is_Pi_R_Squared

The square root of pi is approximately 1.7725. A longer approximation of the square root of pi is 1.7724538509055160272981674833411. The square root of pi goes on forever.
http://answers.ask.com/Reference/Dictionaries/what...

Pie r squared isn't anything. Pi r squared is the formula for the area of a circle, given its radius. ChaCha on!
http://www.chacha.com/question/whatispirsquare...

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