Can points on an integer lattice form the vertices of a regular hexagon
117020
Regular $n$-gon in the plane with vertices on integers?
128277
Ising model on lattices with (vertical side length) $\neq$ (horizontal side length)
132085
Minkowski sum and product of 2D-regions
141101
Russia (2000) contest:Prove the existence of a pair of rows and columns with intersections differently coloured
89501
Equidecomposability of a Cube into 6 Trirectangular Tetrahedra
41907
Triangulation of a simple polygon (elementary proof?)
13961
An example of a lattice that's not totally ordered
147560
How-to cast a set of random points on the surface of a cuboid?
147429
Set of points in $\mathbb{C}$ s.t. $z^{n-1} = \overline z$
117707
d-regular bipartite graph
146933
Proving bipartition in a connected planar graph
13378
Round a float to a regular grid of predefined points
73578
Do infinitely many points in a plane with integer distances lie on a line?
71990
Prove there always exists a partition such that vertices in each part have even degree
76381
Plain integer partitions of $n$ using $r$ parts
130851
Squaring the plane, with consecutive integer squares. And a related arrangement
24477
Monochromatic squares in a colored plane