Why using area and perimeter rules doesn't give the right answer?

I have created yet another sometime pass solution which got past random testing on the first try, but will fail a tests such as:

33 40 'Upstream 0'
Expected: 0.83, instead got: 0.82

Random testing should be strengthened to guarantee such tests appear.

Please, check if input '39.63° S, 100.00° W', '23.13° S, 35.97 W' should return 3300KM or something different because I didn't pass this test in the first attempt. It showed that the correct result was about 6100KM.

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Go Translation awaiting approval. Please take a look?
https://www.codewars.com/kata/5808dcb8f0ed42ae34000031/translations#:~:text=%22Switch%20it%20Up!%22%20Go%20Translation

Ruby 3.0 should be enabled, see this to learn how to do it

Ruby 3.0 should be enabled, see this to learn how to do it

Ruby 3.0 should be enabled.

I think at least one more basic tests should be added because with only two examples we cannot be sure of what we're supposed to do.

No tests with superfluous character at the beginning/end of the string.

Ruby translation kumited, including an updated description -- please check and approve (note: author is inactive)

in python at least, the random tests are sending inputs that aren't triangles... (like 6,55,93)

Task is unclear. ( I was expecting eight coordinates as input, and worrying about all sorts of rotations already. )

Also, what's wrong with uninteger numbers? A cube with a volume of 2 or 99 is a perfectly good cube.

I'd commend you for all the maths gobbledygook, but you copied that from Wikipedia, and it has nothing whatsoever to do with the task.