Kedah, also known by its honorific Darul Aman and historically as Queda, is a state of Malaysia, located in the northwestern part of Peninsular Malaysia. The state covers a total area of over 9,000 km², and consists of a mainland portion and the Langkawi islands. The mainland has relatively flat terrain, which is used to grow rice, while Langkawi is composed o…Kedah, also known by its honorific Darul Aman and historically as Queda, is a state of Malaysia, located in the northwestern part of Peninsular Malaysia. The state covers a total area of over 9,000 km², and consists of a mainland portion and the Langkawi islands. The mainland has relatively flat terrain, which is used to grow rice, while Langkawi is composed of mostly of uninhabited islands.