Question

Calculating pi manually

score 34.2k · Answer 1 · 2026-03-27 16:19:26

34.2k

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Calculating pi manually

Published on 27 Mar 2026 - 16:19

score 313 · Answer 2 · 2015-03-17 10:43:08

313

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If $\dfrac{\mathrm {circumference}}{\mathrm {diameter}}$ is the same for all circles, does the surface have to be flat?

Published on 17 Mar 2015 - 10:43

score 207 · Answer 3 · 2015-03-17 15:13:02

207

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$ \sum _{n=1}^{\infty} \frac 1 {n^2} =\frac {\pi ^2}{6} $ then $ \sum _{n=1}^{\infty} \frac 1 {(2n -1)^2} $

Published on 17 Mar 2015 - 15:13

score 325 · Answer 4 · 2015-03-19 17:03:52

325

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Where do the numbers come from, to calculate pi?

Published on 19 Mar 2015 - 17:03

score 977 · Answer 5 · 2015-03-21 01:29:40

977

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Repetition in pi

Published on 21 Mar 2015 - 1:29

score 560 · Answer 6 · 2015-03-23 21:42:10

560

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Show that $\pi =4-\sum_{n=1}^{\infty }\frac{(n)!(n-1)!}{(2n+1)!}2^{n+1}$

Published on 23 Mar 2015 - 21:42

score 262 · Answer 7 · 2026-03-28 08:09:58

262

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ratio of "diameter" of a n-gon to perimeter

Published on 28 Mar 2026 - 8:09

score 36.6k · Answer 8 · 2015-03-29 17:26:50

36.6k

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How does atan(1) * 4 equal PI?

Published on 29 Mar 2015 - 17:26

score 351 · Answer 9 · 2015-03-30 09:44:59

351

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Does π start with two identical decimal sequences?

Published on 30 Mar 2015 - 9:44

score 533 · Answer 10 · 2015-04-06 19:51:05

533

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Is it possible to intuitively explain, how the three irrational numbers $e$, $i$ and $\pi$ are related?

Published on 06 Apr 2015 - 19:51

score 4.2k · Answer 11 · 2015-04-08 04:55:41

4.2k

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How To Calculate a Tangent In Degrees Without a Calculator

Published on 08 Apr 2015 - 4:55

score 292 · Answer 12 · 2015-04-11 00:10:00

292

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Deriving the value of $\pi$ from a dart board

Published on 11 Apr 2015 - 0:10

score 6.4k · Answer 13 · 2026-03-27 06:09:50

6.4k

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How to convert $\pi$ to base 16?

Published on 27 Mar 2026 - 6:09

score 1.3k · Answer 14 · 2015-04-20 03:02:50

1.3k

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Explain why $e^{i\pi} = -1$ to an $8^{th}$ grader?

Published on 20 Apr 2015 - 3:02

score 169 · Answer 15 · 2026-03-27 07:49:14

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$\pi$ base $e$ or $\pi=\sum\limits_{n=-1}^{\infty} a_ne^{-n}$ where $a_n\in\{0,1,-1\}$

Published on 27 Mar 2026 - 7:49

List Question

Calculating pi manually

If $\dfrac{\mathrm {circumference}}{\mathrm {diameter}}$ is the same for all circles, does the surface have to be flat?

$ \sum _{n=1}^{\infty} \frac 1 {n^2} =\frac {\pi ^2}{6} $ then $ \sum _{n=1}^{\infty} \frac 1 {(2n -1)^2} $

Where do the numbers come from, to calculate pi?

Repetition in pi

Show that $\pi =4-\sum_{n=1}^{\infty }\frac{(n)!(n-1)!}{(2n+1)!}2^{n+1}$

ratio of "diameter" of a n-gon to perimeter

How does atan(1) * 4 equal PI?

Does π start with two identical decimal sequences?

Is it possible to intuitively explain, how the three irrational numbers $e$, $i$ and $\pi$ are related?

How To Calculate a Tangent In Degrees Without a Calculator

Deriving the value of $\pi$ from a dart board

How to convert $\pi$ to base 16?

Explain why $e^{i\pi} = -1$ to an $8^{th}$ grader?

$\pi$ base $e$ or $\pi=\sum\limits_{n=-1}^{\infty} a_ne^{-n}$ where $a_n\in\{0,1,-1\}$

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