You could ask someone for help, or you could figure it out yourself--it's your decision.
Suggestion:
So if the polygon has 4 angles that total 360, then to find one of the angles you subtract the 3 angle values from 360.
I hope this helps.
I types it into a translator and it said it was Romanian. This is what it means:
"Specifies which is the number of letters and sounds in case of words you choose and Sahu"
Hope this helps! :)