Rectangles offer a few advantages. The are easy to attach to flagpoles (compared to circles, for example) and they flap nicely in the wind. They are relatively easy to make. They offer a convenient surface on which to depict national symbols. You should also note that to this day, most paintings or drawings are done on rectangular canvass, rectangular paper, or other rectangular surfaces. It's convenient.
Nepal is the only country with a flag that is not a rectangle
Rectangle
Flags do not have to be a rectangle. The flag of Nepal is not a rectangle. It is the only country in the world that is not rectangular. A rectangle is a simple shape to work with, so most flags are rectangles.
There are 13 alternating stripes on the American flag. There are also 50 white stars in the blue rectangle representing the 50 states in the union.
The star that represents Texas is located in the far right vertical column. It is the star that is 2nd from the top. If you draw a rectangle shape with that particular star being on the left side of the rectangle, you will find that the Texas flag will appear within that rectangle. The Texas flag is always flying when a U.S. flag is flying. The Texas flag just happens to blend in to the U.S. flag until you place a rectangle around it. The Texas flag is the only state flag that is allowed to fly within the U.S. Flag.
The American flag contains six white stripes.
a rectangle
The norm... a rectangle.
American flag is correct.
The American Flag.
not 100% sure from your description but sounds like Panama's flag.
American flag