No.
Half a sphere is a hemisphere or the shape of a ball cut in half.
Trapizoid &triangle
The shape you will get if you cut a cuboid in half is a cube.
Im not to sure if I get what you mean by this but i think that you mean that what shape can be cut in half evenly? If this is the case then it is any shape really unless it is irregular.
Yes, a shape is symmetrical if it can be cut in half in any way, and be the same on both sides.
Half a sphere is a hemisphere or the shape of a ball cut in half.
when you cut a pentagon in half you create a trapizoid
a hemisphere
Trapizoid &triangle
A triangle
You get a hemisphere.
a smaller cylinder when cut horizontally. A semi-circle when cut vertically
square
a circle
The shape you will get if you cut a cuboid in half is a cube.
Im not to sure if I get what you mean by this but i think that you mean that what shape can be cut in half evenly? If this is the case then it is any shape really unless it is irregular.
bilateral symmetry it can always be cut in half