Problem 59249. Compute the total length of lines between all vertices of a regular polygon

The test suite seems suspicious to me. The length of the diagonals will add up to n, and the length of the edges will never be more than 2*pi*r = 6.28. Where are all the big values coming from?

"Diagonals" was confusing, so I changed the wording and added another example.

Oh, I see. The example of the square led me to believe that "diagonal" meant "diameter". Thanks for the clarification!

I am having precision problems with the first and third assert()'s in test 14. The relative precision on the first is about 1e-10 and it is getting a sum that is different by about 3 units. For the third, the error is much worse because if any of the elements of a() are off by even 1 unit, they don't trigger the isprime() and don''t get included in the sum.