A cuboid.
A two-dimensional shape with three sides is a triangle. A three-dimensional shape with three faces is a cylinder.
a polyhedron * * * * * That is only if it is bounded by plane faces. A sphere, for example, is a three dimensional shape but is not a polyhedron: it is a solid shape.
There is none you idiot
A cube.
decahedron
sphere
A double helix
triacontahedron
Hexagon
A shape that has 10 sides (two dimensional) is called a decagon. A shape that has 10 faces (three dimensional) is call a decahedron.
In science, a three-dimensional oval is called an ovoid. Less formally, a three-dimensional oval shape is called an egg.
then it's a - Dodecahedron