Solid Geometry

3d shapes


Solid Geometry is the geometry of three-dimensional space,
the kind of space we live in.

Three Dimensions

It is called three-dimensional,
or 3D, because there are
three dimensions: width, depth and height.

  3d height width depth

Simple Shapes

Let us start with some of the simplest shapes:

shapes thumbnail
Common 3D Shapes


Solids have properties (special things about them), such as:

Polyhedra and Non-Polyhedra

There are two main types of solids, "Polyhedra", and "Non-Polyhedra":

Polyhedra :
(they must have
flat faces)
cube or hexahedron square prism Cubes and
Cuboids (Volume
of a Cuboid
tetrahedron cube or hexahedron octahedron dodecahedron icosahedron Platonic Solids
triangular prism square prism pentagonal prism Prisms
triangular pyramid square pyramid pentagonal pyramid Pyramids
(when any surface
is not flat)
sphere Sphere torus Torus
cylinder Cylinder cone Cone