Where in the world?
The flag of Sudan is composed of three equal horizontal bands of red, white and black, with a green isosceles triangle superimposed on the hoist side. The green triangle spans about two-fifth the width of the field with its base on the hoist end.

Republic of the Sudan

Native name: SudanPopulation: 43,849,269Region: AfricaSub region: Northern AfricaCapital: KhartoumTop level domain: .sdCurrencies: Sudanese poundLanguages: Arabic, English
Border Countries:Central African RepublicChadEgyptEritreaEthiopiaLibyaSouth Sudan