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I have been banging my head up and down the Oracle help center for an hour to find the solution. I can't seem to make it work.

I have a simple problem: I need to square PI for a Torus ring in Java.

Here is the line with the problem:

surfaceArea = ( 4 * Math.pow( PI, 2 ) * radiusI * radiusO );

I get an error saying it needs ( double , double) but only finds double

Do I declare PI? Like a  final double PI = math.PI


Any Java gurus willing to wade in and illuminate my problem?


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