construct quadrilateral, given 2 circumcenters + 2 incenters, by diagonals
Source: 2015 Sharygin Geometry Olympiad Correspondence Round P16
August 2, 2018
geometrycircumcircleincenter
Problem Statement
The diagonals of a convex quadrilateral divide it into four triangles. Restore the quadrilateral by the circumcenters of two adjacent triangles and the incenters of two mutually opposite triangles