The term you're looking for is "asymmetrical." However, "asymmetrical" actually means lacking symmetry, so it does not fit your criteria. A shape with at least one line of symmetry could be described as "symmetrical," but that only has 10 letters. If you have another specific term or context in mind, please clarify!
6
There are 11 letters with only one line of symmetry.
Septahedron
C has 1 horizontal line of symmetry V & W have one vertical line of symmetry.
A letter I i.
6
There are 11 letters with only one line of symmetry.
Septahedron
C has 1 horizontal line of symmetry V & W have one vertical line of symmetry.
a shape with a line of symmetry
ALL letters have at least one line of rotational symmetry. However - if you mean reflective symmetry, the letters F, G, J, L, P, Q, R, S, & Z do not.
A letter I i.
An isosceles triangle has one line of symmetry
How about an isosceles triangle which has one line of symmetry
The shape you're looking for is "seesaw." It has 11 letters, possesses at least one line of symmetry, and starts with the letter "s." A seesaw can be symmetrical along its central axis.
square
An isosceles triangle and a kite have only one line of symmetry.