Where in the world?
The flag of the Republic of the Congo features a yellow diagonal band that extends from the lower hoist-side corner to the upper fly-side corner of the field. Above and beneath this band are a green and red triangle respectively.

Republic of the Congo

Native Name: République du Congo

Population: 6,142,180

Region: Africa

Sub Region: Middle Africa

Capital: Brazzaville

Currencies: Central African CFA franc

Top Level Domain: .cg

Languages: French, Kikongo, Lingala

Border Countries: DR CongoCameroonGabonCentral African RepublicAngola