We come across a number of objects of different shapes and sizes in our day to day life. There are golf balls, door mats, ice-cream cones, coke cans and so on. These objects have different characteristic properties such as length, breadth, diameter, etc. which set them apart from one another. But no matter how different their dimensions are, all of them occupy space and have three dimensions. So they are referred to as three-dimensional or solid shapes.
A net is a flattened out three-dimensional solid. It is the basic skeleton outline in two dimensions, which can be folded and glued together to obtain the 3D structure.
Nets are used for making 3D shapes. Let us have a look at nets for different solids.