Editing Magic square (section)

===Geometric magic squares===
[[File:Geomagic square - Diamonds.jpg|thumb|right| text-bottom |160px|A geometric magic square.]]
Magic squares may be constructed which contain geometric shapes instead of numbers. Such squares, known as [[geometric magic square]]s, were invented and named by [[Lee Sallows]] in 2001.<ref>[https://www.theguardian.com/science/2011/apr/03/magic-squares-geomagic-lee-sallows Magic squares are given a whole new dimension], [[The Observer]], April 3, 2011</ref>

In the example shown the shapes appearing are two dimensional. It was Sallows' discovery that ''all'' magic squares are geometric, the numbers that appear in numerical magic squares can be interpreted as a shorthand notation which indicates the lengths of straight line segments that are the geometric 'shapes' occurring in the square. That is, numerical magic squares are that special case of a geometric magic square using one dimensional shapes.<ref name=PourlaScience>[https://www.pourlascience.fr/sd/mathematiques/les-carres-magiques-geometriques-7372.php Les carrés magiques géométriques] by Jean-Paul Delahaye, ''Pour La Science'' No. 428, June 2013</ref>