12-Amethyst

Question

Happy Pi Day

Forum|Forum|15 years ago
March 14, 2011
8 replies
20495 views

For all the mathematics fans out there, I wish you a Happy Pi Day (3/14); celebrating everyone's favorite mathematical constant

Here are some ways to celebrate >>

-Dan

Other

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LucMeekes

23-Emerald IV

Dan,

I have some problems with your statement, on mathematical and logic grounds.

- 3/14=0.2142857.... which is far away from 3.14159265....

- While it is easy to prove that there exist no uninteresting numbers, I doubt that you can prove that Pi is everyone's favourite mathematical constant.

Luc

R

RichardJ

19-Tanzanite

To me, e seems more natural

S

StuartBruff

23-Emerald V

Richard Jackson wrote:
To me, e seems more natural

Agreed. I'm a great exponent of eating πie off a log table made from the branches of trees with square roots (although some think this is rather radical, I think it's an integral part of the experience; it's what differentiates the true mathematician from the remainder)

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ValeryOchkov

24-Ruby IV

Students in Russia know the second math constant e as 2.7 (all know it) + two times... Leo Tolstoy - a year of him born - 2.718281828.

L

lvl107

20-Turquoise

Loi.

20-Turquoise

1-Visitor

Happy pie day

Mike

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ValeryOchkov

24-Ruby IV

Mike Armstrong wrote:
Happy pie day
Yes - three base math constants - p (p+Ctrl+G), i and e.

M

MikeArmstrong

1-Visitor

I do have one issue:- I can't believe anyone celebrates pie day like pancake day.

Mike

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VladimirN

24-Ruby III

Happy pi/pie day:

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ValeryOchkov

24-Ruby IV

VladimirN. wrote:
Happy pi/pie day:

More practical Pi-pie

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ValeryOchkov

24-Ruby IV

More about Pi day and Pi Pie (Fractions).

Why I did not have Mathcad with gcd function in the first class of my school

See more about this problem here - http://communities.ptc.com/docs/DOC-3522

$fracion.png$

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ValeryOchkov

24-Ruby IV

Happy Pi, e & i day.

The 6 of the Mathcad Clock has Pi, e & i - 3 base Math constants:

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RogerMansfield

1-Visitor

I'd like to remember Pi Day by making reference to one of your previous posts, Valery. (I could not think of a good reply to your remarks about Laplace transforms, so I did not post there.)

A circular slide rule is compact precisely because it wraps a linear slide rule around the circumference of a circle. The key to the transformation is pi.

Here is a snapshot of my own circular slide rule, a Sama and Etani "Model 90" (the diameter is 90 mm). Note that the "1" indicator on the C scale is lined up with pi on the D scale. So slide (rotate) the red indicator around to 9 on the C scale (for 90 mm) and read off 2.83 (i.e., 283 mm) from the D scale. Therefore, pi times the diameter 90mm is the circumference 283 mm.

Since there are 25.4 mm to an inch, we get 283/25.4 = 11.1 inches. To do this division on the circular rule, rotate the C scale until 2.54 is beneath 2.83 on the D scale. Then the C scale's "1" indicator points to 1.11 (11.1 inches) on the D scale. So our circular slide rule is equivalent to an 11-inch straight rule, at least for multiplication and division, since they use scales near the circumference of the rule.

Pi rules!