#modernconstructiongeometry
Today I learnt:

If you have a circle drawn entirely within another, then the diagonals of the "circum-inscribed" quadrilateral will intersect on the line which passes through the centres of the circles.

Full article at:
arxiv.org/pdf/1709.02562

#modernconstructiongeometry
#mathsky
#mathstalk
April 19, 2025 at 5:30 PM