The flag of Trinidad and Tobago has one line of symmetry.
No line of symmetry
one vertical line of symmetry.
The flag of Ukraine has 1 line of symmetry.
England, Great Britain, Japan, Austria, Bangladesh, Costa Rica and probably many more!
It has one and only one line of symmetry!!
It has 4 line symmetry inside of the United Kingdom flag.
One vertical line on the middle.
the British flag has no lines of symmetry it only has a point of symmetry (in the middle of the flag)