The area of a shape is the size of its two dimensional surface. When a square measures 1 cm by 1 cm, we say it has an area of 1 cm 2 (centimetre squared). This rectangle covers 15 squares so it has an ...

The perimeter is the distance around the outside of a closed 2D shape, space or area. You see the perimeter in real life on a football pitch or around a house to show its boundary. You can only find ...

A puzzle posted in an online community unlocked a wormhole within the basic shape. Credit...Ian Henderson Supported by By Siobhan Roberts Lisanne Taams, a student at Radboud University in the ...