Formal:
* Kia ora, e hoa. (This is the most common and polite way to greet a friend.)
Informal:
* Kia ora, hoa. (This is a slightly more casual way to greet a friend.)
* Tena koe, hoa. (This is another informal greeting, often used among friends.)
* Ata mārie, hoa. (This greeting is used in the morning.)
Adding "friend" to other greetings:
* Kia ora koe, e hoa. (This is a more formal way to say "hello friend.")
* Tena koe, e hoa. (This is a more informal way to say "hello friend.")
You can also use a phrase like:
* Kei te pēhea koe, hoa? (How are you, friend?)
It's important to remember that Māori is a living language, and there is no single "correct" way to say anything. The best way to learn is to listen to native speakers and practice speaking the language.