Nice try for a first kata, but I'm afraid that auto-retire is incoming... Practice some more here and start making katas again when you have a much more clear view of how and what to do (and not to do).

In the meantime, do some reading here: https://docs.codewars.com/authoring/guidelines/kata

Area should be rounded (as a whole number), meaning both 5.00 and 5.60 should be returned as 5

floor division/truncating != rounding

Returning different data types is bad practice (None vs string)

There're no tests where the first 2 arguments are equal and greater than zero, but the third argument is too big to form a triangle.

It's not stated what the inputs are supposed to represent.

The inputs for right triangles are very inaccurate:

c**2 = 100.0
a**2 + b**2 = 99.9698
None should equal 'Triangle with area of 24'

c**2 = 199.9396
a**2 + b**2 = 200.0
None should equal 'Triangle with area of 50'

c**2 = 309136.0
a**2 + b**2 = 320000.0
None should equal 'Triangle with area of 80000'

No random tests.

• Unless the kata is supposed to be a puzzle, the description should properly explain what the code is supposed to do instead of just saying "something wrong, fix plz"
• The function name should be in snake_case
• Tests are not using the describe and it blocks correctly
• No random tests
• If rewriting the whole thing from scratch is far easier than fixing the initial solution, then it's simply a bad bug-fixing kata