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, Česko
Population:
10,882,341
Region:
Europe
Sub Region:
Central Europe
Capital:
Prague
Top Level Domain:
.cz
Currencies:
Czech koruna