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

Czechia

Native Name: Česko

Population: 10,698,896

Region: Europe

Sub Region: Central Europe

Capital: Prague

Currencies: Czech koruna

Top Level Domain: .cz

Languages: Czech, Slovak

Border Countries: SlovakiaGermanyPolandAustria