From four-dimensional hexagons to the mind-bending amplituhedron, geometrical shapes are wilder than we learn at school - and they are a crucial tool for understanding reality ...

Quickly create perfect shapes in PowerPoint by using the "Shift" key when you are drawing the shape. This will keep the height and width of the shape equal, so that quadrilateral shapes will be ...

Two-dimensional (2D) shapes are completely flat. 2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A ...