How do you say why are mad in french?

There are a few ways to say "Why are you mad?" in French, depending on the context and level of formality:

Formal:

* Pourquoi êtes-vous en colère? (This is the most direct and literal translation)

* Quelle est la raison de votre colère? (This translates to "What is the reason for your anger?")

* Qu'est-ce qui vous met en colère? (This asks "What is making you angry?")

Informal:

* Pourquoi tu es énervé(e)? (This is a casual way to ask the question)

* C'est quoi le problème? (This means "What's the problem?")

* Qu'est-ce qui te fâche? (This asks "What's bothering you?")

You can also use more idiomatic expressions like:

* Qu'est-ce qui te prend? (This literally means "What's gotten into you?")

* T'as un problème? (This is a very informal way to ask "Do you have a problem?")

The best way to choose the right expression depends on your relationship with the person you are speaking to and the situation.