what
The Italian word 'che' is used in the same manner as 'what' in English. It is often used to ask questions about the nature or identity of something, or to express surprise.
I believe you are right.
This is an Italian phrase expressing a belief or assumption about the correctness of someone else's viewpoint, using the conjunction 'che' to introduce the subjective clause which translates to 'that' in English.
What a nice day!
This is an exclamation in Italian, using the word 'che' to express surprise, wonder or admiration about something, serving a similar function to 'what' in English in this context.
I like the food that you cooked.
In this Italian sentence, 'che' is a relative pronoun introducing a clause modifying the noun 'cibo', providing additional information about it. It could be directly translated as 'that' in English.