An isosceles triangle
a symmetrical shape
a isosceles triangle has at least 1 line of symmetry but only has 9 letters
a shape with a line of symmetry
The answer is a septahedron, 11 letter answer
Septahedron
The 2D shape which has one line of symmetry is the trapezium.
An isosceles triangle has one line of symmetry
The letters S, N, Z, for example.
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.
a bottomhead
Not necessarily.
no