Do you have trouble making sense of word problems? Try these tips:
1) What is the problem asking you to do?
-- Circle the question or problem statement. This is usually at the end of the problem. (Write an equation?)
-- Is this similar to other problems you have solved? If so, how? (Equations of a line?)
-- What will be the form of...
I must admit I was unaware of this controversy, but it makes some sense to stop using the constant pi, and to use a new term, tau, instead. Tau is defined as 2 times pi, which would be 6.283. This is explained in a fun article in a recent Scientific American story: