Question

Every national flag in the world shares a common geometric characteristic, except for one country. which country is it?

Answer 1

Nepal's Flag

Step-by-step explanation:

Most countries geometrically have a rectangular flag, but Nepal doesn't share this. Nepal has a triangular flag. Also, Switzerland has a square instead of rectangular flag, but that shouldn't matter too much.

Answer 2

Nepal's flag is the only national flag that isn't based on a quadrilateral shape. Hope I helped.