Is the MGM Grand Garden Arena in the Hotel?

I'm going to the UFC fight this weekend in Las Vegas and I can only find directions to the MGM Grand Hotel and Casino and the fight is in the Garden Arena. I was wondering whether or not the two were in the same building or close enough where it didn't matter which one you were given directions to. If they are nowhere near each other will you please tell me where I can find the Garden Arena? Thank you.