dotnet/corefx — pull request #87 by arecker (2014-11-14 17:44:51+00:00)
Title: Changed math helper class to use its own Pi property

Maybe nitpicking, but I just wanted to contribute to the .NET core :)

The math helper class was re evaluating ```(float)Math.PI``` instead of using its own public property.
Also fixed the grammar on a comment while I was oggling the code.