Guest chendoh Posted April 17, 2007 Report Posted April 17, 2007 Suppose if every one in the world (one fine day) lost their memories and confused between icosahedrals and circles, well... :phones: RTP...Love the reference to Icosahedrals!.....
Qfwfq Posted April 17, 2007 Report Posted April 17, 2007 How can Pi ever be wrong? The relation between the diameter and circumference of a circle is set in stone. Take a tape and measure it, for dog's sake.But if you take the ratio of circumference to radius, it is twice pi. There's no point in discussing whether pi is wrong, it's only a matter of whatcha wanna call pi. If we all call something pi, why call something else pi? If you like, you can call 2pi Sachertorte or something.
Boerseun Posted April 18, 2007 Report Posted April 18, 2007 But if you take the ratio of circumference to radius, it is twice pi.Only because the diameter is twice the radius. I fail to see the issue here... Uhhh.... I'll change my Steak 'n Kidney for a Pepper Steak Pi, please.
Qfwfq Posted April 18, 2007 Report Posted April 18, 2007 (edited) Sachertorte is far more refined than Steak'n'Kidney or Pepper Steak. Although... What's in a name? that which we call a roseBy any other name would smell as sweet;So Romeo would, were he not Romeo call'd ...and yet changing horses in mid stream causes a lot of confusion, so better call a spade a spade, like everybody does. Only because the diameter is twice the radius.Only, no more than, no less than. Which is to say exactly. Now the ratio of a sphere's volume to it's radius cubed is [math]\frac43\pi[/math] and I vote we call that Margherita. Wait... :doh: that could be troublesome, some folks take it with origano and some without! Edited October 17, 2011 by Qfwfq latex woes (mainly)
granpa Posted July 3, 2011 Report Posted July 3, 2011 http://en.wikipedia.org/wiki/N-sphere the equations for an n dimensional sphere are:
SciFiSid Posted July 24, 2011 Report Posted July 24, 2011 hello. well, can any one properly explain me why it is wrong?
granpa Posted July 24, 2011 Report Posted July 24, 2011 there have been a lot of threads on this lately. http://en.wikipedia.org/wiki/Tau_%282%CF%80%29 In mathematics, tau (τ) is a constant which has been proposed by Bob Palais, Peter Harremoes, Hermann Laurent, Fred Hoyle, Michael Hartl, and others, as a replacement for the familiar circle-constant π.[1][2][3][4] Their main reason is that circles are more naturally defined by their radius than by their diameter.[note 1] The value τ = 2π, or approximately 6.28318,[5] occurs very frequently in mathematics.
FrankM Posted July 26, 2011 Report Posted July 26, 2011 In mathematics, tau (τ) is a constant which has been proposed by Bob Palais, Peter Harremoes, Hermann Laurent, Fred Hoyle, Michael Hartl, and others, as a replacement for the familiar circle-constant π.[1][2][3][4] Their main reason is that circles are more naturally defined by their radius than by their diameter.[note 1] The value τ = 2π, or approximately 6.28318,[5] occurs very frequently in mathematics. The value of 2π can represent an angular measure. A paper was published today by IEEE Potentials, July/August 2011 edition, titled,Methodology to Define Physical Constants Using Mathematical Constants http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=45 It is on the 2nd page of the Contents. Bob Palais' article is cited in the paper. 2π is the key value.
Slinkey Posted October 11, 2011 Report Posted October 11, 2011 I don't quite see how "the historical choice of the value of π obscures the benefit of radian measure." A radian is defined as a distance on the circumference of a circle that is equal to its radius. Whatever way you want to cut it that makes the number of radians in a full turn = 2π If some people have a problem with π/2 = 90 degrees then I guess they should do something other than maths. Perhaps crocheting would be more apposite. And chicken and mushroom pi is far superior to any other pi.
Eclogite Posted October 11, 2011 Report Posted October 11, 2011 Well, this thread seems to be going in circles.
Slinkey Posted October 11, 2011 Report Posted October 11, 2011 Sure, but you get 2 pi's each time round.
phision Posted October 12, 2011 Report Posted October 12, 2011 If some people have a problem with π/2 = 90 degrees Pi divided by 2, doesn't equal 90 degrees: pi radians divided by 2, equals 90 degrees! Sure, but you get 2 pi's each time round.Plural of pi is pis and in each rotation you would have, 2 pi(singular) radians(plural)! Nice try at humour though...god loves a trier. CraigD 1
Qfwfq Posted October 17, 2011 Report Posted October 17, 2011 Well, this thread seems to be going in circles.You're right, we could even say it is Kreisy, which an English reader might pronounce a bit like..... crazy.
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