evidence: Bosnia and Herzegovina is country in Southeast Europe, located in western part of Balkan peninsula. Etymology of the name Bosnia is has not been fully elucidated, although there are several theories. It is known that this name was historically recorded for the first time in the 10th century in work title De Administrando Imperio, by Constantine VII, Byzantine emperor. Name Herzegovina comes from title of medieval nobleman Stjepan Vukčić Kosača – herzog of Saint Sava. Even though they are different in terms of age, historic hierarchy and size, Bosnia on the north and Herzegovina on the south today represent two equal regions in the context of country name. Bosnia and Herzegovina territory covers an area of 51,129 square kilometers. It is surrounded by three neighboring countries – Republic of Croatia to the north, west and south, Republic of Serbia to the east, and Republic of Montenegro to the southeast. Its borders generally follow certain natural features, and for the most of its extent have orographic and hydrographic character. Bosnia and Herzegovina also has one of the shortest coastline in the world. In the sector of Bay of Neum and peninsula of Klek in the Bay of Mali Ston, it reaches Adriatic Sea, with coastal facade of 24 kilometers in length. Characteristic shape of national territory on a geographic map is frequently associated with the right triangle with even legs, whose hypotenuse has northwest-southeast direction. This motive is also used on the national flag.