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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I guess you get something wrong in the formula. I suggest looking up a simpler formula to calculate the area of the "slice".
acosis needed, but you need to use it correctly.Cheers
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