Square root of 2
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The square root of 2 is the positive real number that, when multiplied by itself or squared, equals the number 2. It may be written as 2 or 2 1 / 2. It is an algebraic number, and therefore not a tran
Babylonian clay tablet YBC 7289 with annotations. Besides showing the square root of 2 in sexagesimal (1 24 51 10), the tablet also gives an example where one side of the square is 30 and the diagonal then is 42 25 35. The sexagesimal digit 30 can also stand for 0 30 = 1/2, in which case 0 42 25 35 is approximately 0.7071065.
Paper size
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Paper size standards govern the size of sheets of paper used as writing paper, stationery, cards, and for some printed documents. Most countries adhere to the ISO 216 standard, which includes the wide
Square root of 2
…cutting a sheet in half along a line results in the smaller sheets having the same (approximate) ratio as the original sheet. When Germany standardised paper sizes at the beginning of the 20th century, they used Lichtenberg's ratio to create the "A" series of paper sizes. Today, the (approximate) aspect ratio of…
Paper sizes A0 to A8, life-size installation The Invasion of the Square Roots at the CosmoCaixa Barcelona science museum