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.
a bottomhead
no
Not necessarily.
semicircles