When Aaliyah’s father saw her applying nail polish instead of doing her math homework, he said you look like you’re working very hard. I’m sure you’ll do great on your test tomorrow. Which type of irony is being used here? How do you know?

The type of irony being used in this statement is verbal irony. This is because Aaliyah's father is being sarcastic or saying the opposite of what he actually means. He is implying that she is not actually working hard or studying for her test tomorrow by painting her nails instead of doing her math homework. This can be inferred by the context of the situation and the tone in which the statement is delivered.