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English: Glyph variants of Greek letter Pi in medieval and early modern minuscule handwriting, according to C. Faulmann, Schriftzeichen und Alphabete aller Zeiten und Völker, Wien 1880.  https://commons.wikimedia.org/wiki/File:Greek_minuscule_Pi.svg  1280px-Greek_minuscule_Pi.svg.png (1280×455)

English: Glyph variants of Greek letter Pi in medieval and early modern minuscule handwriting, according to C. Faulmann, Schriftzeichen und Alphabete aller Zeiten und Völker, Wien 1880. https://commons.wikimedia.org/wiki/File:Greek_minuscule_Pi.svg 1280px-Greek_minuscule_Pi.svg.png (1280×455)

Glyph variants of Greek letter Pi in ancient cursive handwriting, according to C. Faulmann, Schriftzeichen und Alphabete aller Zeiten und Völker, Wien 1880.  2000px-Greek_cursive_variants_Pi.svg.png (2000×711)

Glyph variants of Greek letter Pi in ancient cursive handwriting, according to C. Faulmann, Schriftzeichen und Alphabete aller Zeiten und Völker, Wien 1880. 2000px-Greek_cursive_variants_Pi.svg.png (2000×711)

Pi is indeed a fascinating number. Memorizing pi is a feat (43,000 digits by Krishan Chahal—took him 5 hours 21 minutes), but you’ve probably heard of that already. What I find more interesting is how few digits of pi you actually need to get anything done.    If you wanted to draw a circle around the known universe (about 10 to the 26th power meters in diameter) and be accurate to the diameter of a proton (10 to the -15 power meters) you’d only need 43 digits of pi.

Pi is indeed a fascinating number. Memorizing pi is a feat (43,000 digits by Krishan Chahal—took him 5 hours 21 minutes), but you’ve probably heard of that already. What I find more interesting is how few digits of pi you actually need to get anything done. If you wanted to draw a circle around the known universe (about 10 to the 26th power meters in diameter) and be accurate to the diameter of a proton (10 to the -15 power meters) you’d only need 43 digits of pi.

2345 digits of pi

2345 digits of pi

In its decimal form, pi never ends or repeats.

In its decimal form, pi never ends or repeats.

archimedian spiral for squaring the circle  666px-Archimedean_spiral_circle_squaring2.svg.png (666×667)

archimedian spiral for squaring the circle 666px-Archimedean_spiral_circle_squaring2.svg.png (666×667)

pi | Exploratorium. Larry Shaw, considerado por muitos o "Príncipe do Pi ...

pi | Exploratorium. Larry Shaw, considerado por muitos o "Príncipe do Pi ...

pi | Pi-CM.svg ‎ ((Imagen SVG, nominalmente 691 × 551 pixels, tamaño de ...

pi | Pi-CM.svg ‎ ((Imagen SVG, nominalmente 691 × 551 pixels, tamaño de ...

Fra engelsk Wikipedia  Greek_alphabet_pi.png (246×80)

Fra engelsk Wikipedia Greek_alphabet_pi.png (246×80)

The lowercase greek letter π, in the font face Palatino Linotype, normal and italic.  https://commons.wikimedia.org/wiki/File:Greek_pi_Palatino.svg  Greek pi Palatino.svg

The lowercase greek letter π, in the font face Palatino Linotype, normal and italic. https://commons.wikimedia.org/wiki/File:Greek_pi_Palatino.svg Greek pi Palatino.svg

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