What does this trace look like? All the points on a circle obtained from a fixed point by rotations of this circle.
68490
For $x\in\mathbb R\setminus\mathbb Q$, the set $\{nx-\lfloor nx\rfloor: n\in \mathbb{N}\}$ is dense on $[0,1)$
40650
Equation for testing if a point is inside a circle
27933
Show that unit circle is not homeomorphic to the real line
95274
Geometric meaning of completion and localization
133186
Understanding the "$\pi$" of a rotating disk
85274
Point reflection over a line
71861
Circles and tangents and circumcircles
110472
Existence of a Pivot Point in Euclidean Geometry
143967
Finding an equation for a circle given its center and a point through which it passes
147429
Set of points in $\mathbb{C}$ s.t. $z^{n-1} = \overline z$
47342
Figure out if a fourth point resides within an angle created by three other points
120404
Showing that the geodesics in hyperbolic upper half-plane model are half circles
109767
Prove that three points are enough to draw/define one and only one circle
78196
Draw all the circles that touch the x-axis and a unit circle
141835
Rigorous Proof: Circle cannot be embedded into the the real line!
133756
Geometric interpretation of $\det(A^T) = \det(A)$
144901
Tangent to a circle through a point