<Tr> <Th> Longest river </Th> <Td> Nyabarongo </Td> </Tr> <Tr> <Th> Largest lake </Th> <Td> <P> Lake Kivu </P> Satellite image of Rwanda </Td> </Tr> <P> Rwanda is located in central Africa, to the east of the Democratic Republic of the Congo, at the co-ordinates 2 ° 00 ′ S 30 ° 0 ′ E ﻿ / ﻿ 2.000 ° S 30.000 ° E ﻿ / - 2.000; 30.000 . </P> <P> At 26,338 square kilometres (10,169 sq mi), Rwanda is the world's 149th - largest country . It is comparable in size to Haiti or the state of Massachusetts in the United States . The entire country is at a high altitude: the lowest point is the Rusizi River at 950 metres (3,117 ft) above sea level . </P>

Which culture dominated the area west of the nile river