I would start by reviewing the function to find an isosceles triangle.
and what is wrong exactly?
Take a look at the test files to check what is expected from your function. It might not be a string.

all errors just say this
Check in the test file if the functions really take 3 parameters.
Please use codeblocks and not images to share text. It’s pretty hard to copy/paste your code and pop it into an editor when it’s an image!
sorry, find a solution so don’t worry
