Equilateral triangle with vertices whose coordinates on the Cartesian plane are integers. Does such a triangle exist?
54205
Equilateral triangle whose vertices are lattice points?
116547
How to create a neighboring list for a given triangulation and find the triangle and construct the tile?
102729
Is there an equidissection of a unit square involving irrational coordinates?
89493
Prove that circumcentre of $ABH,BCH,CAH$ are the vertices of a triangle congruent to $ABC$
130517
$ABCD$ is a square and $AEB$ is an equilateral triangle. Find $\angle DEC$.
148307
Intersection of Altitudes in Hexagon
127004
Extreme of $\cos A\cos B\cos C$ in a triangle without calculus.
110472
Existence of a Pivot Point in Euclidean Geometry
73578
Do infinitely many points in a plane with integer distances lie on a line?
92267
Adjacency matrix and existence of triangle
40952
Showing that sum of angles of hyperbolic triangle is strictly less than $\pi$
45913
If a quadrilateral has a pair of equal opposite sides, and a pair of equal opposite angles, then is it necessarily a parallelogram?
89452
Proof about Graph with no triangle
52918
Inside an equilateral triangle $ABC$,an arbitrary point $P$ is taken from which the perpendiculars $PD,PE$ and $PF$ are dropped onto the sides...
87206
Prove that a triangle can be inscribed in the hyperbola $xy=c^2$ whose sides touch the parabola $y^2=4ax$.
83493
Map an arbitrary triangle to the unit square
26222
how can I find the Side length Two squares inside an equilateral Triangle?