Today is Pi Approximation Day. What is Pi Approximation Day? It's always on the 22nd of July because that's 22/7... ...which is the commonest Pi approximation ... but there's loads of others .. 22/7 = 3.14285714286 ... 355/113 = 3.141592620 ... 52163/16604 = 3.141592387 ..... 86953/27678 = 3.1415926006 ... and then there's this sort of thing ... " infinite series" ... Pi/2 = 2/1 x 2/3 x 4/3 x 4/5 x 6/5 x 6/7 ........ and on and on .. ( and on) and Pi/4 = 1 - a third + a fifth - a seventh + a ninth -one eleventh + one thirteenth..... ...and so they go on for ever and ever. Every calculation of pi is just an approximation ..... even though computers have generated thousands of digits of pi, they can never get all of it. And you might think ... what use, for us birders, is pi ? Well, I needed it to work out the area of my 3km-radius local patch. 16-the-3k.html 880-crafty-calculations.html ( There's more, but I can't find them) ( If you find them, let me know) There's also a fascinating post-from-the-past-that-I-can't-find in which a bird surveyor had 3 circular survey areas to cover,and all three circles were touching each other like 3 beer-mats. Each had , if I remember rightly, a radius of 1km. And my π -related question was ... was was the area of that space in the middle ? That should keep you busy for a while. Meantime, here's a mesmerising video .. Christine and the Queens .. "Tilted" ... I die way before Methuselah
So I'll fight sleep with Ammonia And every morning with eyes all red I'll miss them for the tears they shed But I'm actually good Can't help it if we're tilted I am actually good Can't help it if we I am actually good Can't help it if we're tilted I am actually good Can't help it if we're tilted I miss prosthesis and mended souls Trample over beauty while singing their thoughts I match them with my euphoria When they said, "Je suis plus folle que toi." But I'm actually good Can't help it if we're tilted I am actually good Can't help it if we I am actually good Can't help it if we're tilted I am actually good Can't help it if we're tilted Nous et la man on est de sortie Pire qu'une simple moitié on compte à demi-demi Pile sur un des bas côtés comme des origamis Le bras tendu paraît cassé tout n'est qu'épis et éclis Ces enfants bizarres Crachés dehors comme par hasard Cachant l'effort dans le griffoir Et une creepy song en étendard qui fait: I'm doing my face With magic marker I'm in my right place Don't be a downer I'm doing my face With magic marker I'm in my right place Don't be a downer I am actually good Can't help it if we're tilted I am actually good Can't help it if we I am actually good Can't help it if we're tilted I am actually good Can't help it if we're tilted I am actually good Can't help it if we I am actually good Can't help it if we're tilted I am actually good Can't help it if we're tilted
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AuthorThat's the author up there ... I was young and sprightly then. Archives
October 2022
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