New posts in Combinatorial Geometry

How many $n$-pointed stars are there?

Venn diagram with rectangles for $n > 3$

Prove that the shortest side of one triangle is the longest side of another, given 3 pairs of points.

Cases where ANY 2 of 3 +/- choices select one of four possible elements

An example of a similar universal cover for 5 points.

Can a rectangle be tiled with $6$ smaller rectangles, such that no smaller set of those rectangles forms a rectangle?

Maximum area of triangle inside a convex polygon

Maximum number of right-angled triangles

Mapping The Unit Disc To The Hemisphere?

Maximum distance between points in a triangle