A sphere is a perfectly round solid figure. All points on the surface of the shape are the same distance away from the centre – we call this distance the radius. The formula for the volume and surface ...

A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...

Note that as the radius of a cell increases from 1x to 3x (left), the surface area increases from 1x to 9x, and the volume increases from 1x to 27x. Eukaryotic cells are more complex than prokaryotic ...