An 8-faced 3D shape is called an octahedron. It is a polyhedron with eight triangular faces, 12 edges, and six vertices.
The protein would have a tertiary structure. This structure results from the unique folding of the single polypeptide chain into a 3D shape, giving the protein its functional conformation.
triangular prism
The atomic sphere.
To make a 3D model of a planet, you can use software like Blender or SketchUp to create the sphere representing the planet's shape. You can then apply textures and colors to the sphere to mimic the planet's surface features. Adding details like mountains, craters, and atmospheres can enhance the realism of the model.
a sphere
A 2D shape is flat and only has a surface area whereas a 3D shape is an object that has surface area and volume.
That will depend on what they are but in general 3D shapes have surface area and volume whereas 2D shapes have only surface area.
cone
There can be no closed 3D shape with only one square and 3 triangles.
A pentagon is a 2D shape. Volume and Surface Area is only found in 3D shapes.
hemisphere
a face.
a sphere :)))
Only one; a triangle is a 2D shape, not a 3D shape. Usually only 3D (or more) shapes are considered to have 'faces'.
Klein Bottle: http://en.wikipedia.org/wiki/Klein_bottle Its circle
the face