50g

I didn't spend a lot of time on this but its a way to use a choose box with a standard case statement.  You can use subroutines in the case statements or add everything to the same program in this way.  This should help all those who were merely looking for a way to convert from rectangular to polar and viceversa.  I appoligize in advance for using global variables.  I'm a bloated code writer and I love it.