<P> It is constitutionally a unitary state , divided into nine departments . Its geography varies from the peaks of the Andes in the West , to the Eastern Lowlands , situated within the Amazon Basin . It is bordered to the north and east by Brazil , to the southeast by Paraguay , to the south by Argentina , to the southwest by Chile , and to the northwest by Peru . One - third of the country is within the Andean mountain range . With 1,098,581 km ( 424,164 sq mi ) of area , Bolivia is the 5th largest country in South America and the 27th largest in the world . </P>
<P> It is constitutionally a unitary state , divided into nine departments . Its geography varies from the peaks of the Andes in the West , to the Eastern Lowlands , situated within the Amazon Basin . It is bordered to the north and east by Brazil , to the southeast by Paraguay , to the south by Argentina , to the southwest by Chile , and to the northwest by Peru . One - third of the country is within the Andean mountain range . With 1,098,581 km ( 424,164 sq mi ) of area , Bolivia is the 5th largest country in South America and the 27th largest in the world . </P>
which two countries are on the western border of bolivia
which two countries are on the western border of bolivia
Chile Peru
Chile Peru