It is the world’s only national flag that is not rectangular- nor square-shaped.
Although officially adopted in 1962, the Nepal’s flag has a long and fascinating history. Overall, it’s certainly peculiar for his odd unique shape, which is based on geometric and mathematical principles. Therefore, the most interesting fact is that Article 5 of the Nepal’s Constitution describes all the instructions to re-create this distinctive, double-triangular flag.
Watch this creative video to discover the mathematical secrets of the Nepal’s national flag:
In conclusion, for the most curious and experts of you, I suggest to have a look at this Geometric/Algebraic Construction of the Nepal’s Flag.