There is something wrong with the arguments the function is getting; a precondition is violated​

It indicates that either the argument is not corresponding to the perimeter or not returning the same as the variable or function. They arise a syntax error and Python parser is unable to understand a line of code.

Explanation:

something will pop up that says “know the answer? answer now! ” and you click on it and write your answer. after you are done, submit it.