W hen most people think of shapes, they imagine a triangle, a rectangle, or maybe even a fancier- sounding rhombus or ...

Faces - A face is a flat or curved surface on a 3D shape. For example a cube has six faces, a cylinder has three and a sphere has just one. Edges - An edge is where two faces meet. For example a ...

Let us take another approach and do the arithmetic to see who actually owns how much of South Africa's land. South Africa has a total surface area of 122 million hectares. As of March 2011 31 million ...