Round and Round
Source: Futility Closet ·
With a pair of compasses, draw a circle on a plane. Then, without changing the width of the compasses, draw a circle on a sphere. Surprisingly, the areas of the planar disk and the spherical cap are equal.
Foire aux questions
Qu'est-ce que Round and Round ?
Round and Round is a site web discovery curated from Futility Closet. With a pair of compasses, draw a circle on a plane. Then, without changing the width of the compasses, draw a circle on a sphere. Surprisingly, the areas of the planar disk and the
Comment puis-je y accéder ou l'essayer ?
You can experience this content directly on its original host (Futility Closet) by clicking the "Open Original" button.
D'où vient ce contenu ?
Curated from Futility Closet by the OnSuggest team to surface the most interesting and serendipitous content on the web.
Dans le même esprit
Toutes les découvertes Références →quondam
Merriam-Webster's Word of the Day for November 6, 2026 is: quondam \KWAHN-dum\ adjective Quondam is an adjective that means “former” or “sometime.” // Many people were surprised to learn that the quondam professor has since become a dancer. See the entry > Examples: “… quondam soccer legend David Beckham and his wife Victoria, formerly known as Posh Spice of the Spice Girls …” — Alex Beam, The Boston Globe , 31 July 2026 Did you know? Looking for an unusual and creative way to say “former”? Quondam (which came to English in the 16th century from Latin quondam , meaning “at one time” or “fo
Narratives of the rites and laws of the Yncas by Avila and Molina and Ondegardo and Salcamayhua
Language: English
Mapped: How Long Europeans Work to Afford Netflix
How long must Europeans work to afford Netflix? Explore the surprising gap in streaming affordability across 37 countries.
Word of the day for November 6
edit · refresh · view Word of the day for November 6 sax n ( music , informal ) Clipping of saxophone . Clipping of saxophonist . sax v ( music , informal ) ( transitive ) Followed by the dummy pronoun it : to play the saxophone . ( intransitive ) To play the saxophone. sax n ( weaponry , obsolete except historical ) A short sword used by Germanic peoples , especially the Saxons , from about the 4th to 10th centuries ; a type of dagger ; a seax ; also, a type of knife or machete used as a cutting tool by these peoples. ( by extension ) A tool, similar to a hatchet , with an edge for cutting sl