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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.
yeh, but there is this this theorem called shoelace that lets you easily get the area of any polygon given the points regular or not regular.
you can try. But it will time out.