New posts in Polygons

Closed form for the area of a convex cyclic n-gon, given the set of edge lengths

What is circumradius $R$ of the great disnub dirhombidodecahedron, or Skilling's figure?

How many triangles can be formed by the vertices of a regular polygon of $n$ sides?

What are the rules for a Tetartoid pentagon?

$\frac{1}{A_1A_2}=\frac{1}{A_1A_3}+\frac{1}{A_1A_4}$.Then find the value of $n$

Sorting a list of points in 2-D clockwise

How to sort vertices of a polygon in counter clockwise order?

Polygons with equal area and perimeter but different number of sides?

Maximum number of vertices in intersection of triangle with box

Expressing vectors in an octagon