Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book or you can draw them on a piece of paper. 2D shapes have sides and corners (also ...

A new quiz aims to distinguish perfectionists from non-perfectionists with a series of fiendishly difficult picture puzzles. The test devised by quiz site Playbuzz asks users to spot the odd one out ...