Why can't we divide a circumference of a circle with it's diameter perfectly?, In short why is Value of Pi Non Terminating?
118374
Is there a proof that $\pi$ is an irrational number?
126040
Geometric explanation of $\sqrt 2 + \sqrt 3 \approx \pi$
126509
C: How to wrap a float to the interval [-pi, pi)
70974
How can zero divided by $i$ be $2\pi$?
19216
Proving that $\arctan(x)+\arctan(1/x)=\pm \pi/2$, could this line of reasoning possibly be correct?
65300
Why is $\pi$ irrational?
61585
Why is area of a surface of revolution integral $2\pi y~ds$? not '$dx$'?
110352
Why is a full turn of the circle 360°? Why not any other number?
155740
Newton's Law of Graviation: Why $G$ and not e.g. $\dfrac{1}{4\pi G_0}$?
137391
How does the unit circle work for trigonometric ratios of non-acute angles?
14447
Direct proof that $\pi$ is not constructible
69203
Calculus proof for the area of a circle
20872
Is it possible for a physical object to have an irrational length?
105973
how do we know the BBP formula for $\pi$ is valid?
85764
Why is surface area not simply $2 \pi \int_{a}^{b} (y) dx$ instead of $2 \pi \int_a^b (y \cdot \sqrt{1 + y'^2}) dx$?
52018
Can $\frac{\sqrt{3}}{\sin20^{\circ}}-\frac{1}{\cos20^{\circ}}$ have two values?
18546
Geometric intuition for $\pi /4 = 1 - 1/3 + 1/5 - \cdots$?