Orthodiagonal quadrilateral ( circumradii of the four triangles)
A quadrilateral is a polygon with four sides (or edges) and four vertices or corners. An orthodiagonal quadrilateral is a quadrilateral in which the diagonals cross at right angles. In other words, it is a four-sided figure in which the line segments between non-adjacent vertices are orthogonal to each other. For any orthodiagonal quadrilateral (ABCD), there is a relation between the circumradii of the four triangles formed by the diagonal intersection P and the vertices of the convex quadrilateral.
|R1||The circumradius of one of the triangles(APB) (m)|
|R3||The circumradius of one of the triangles(DPA)) (m)|
|R2||The circumradius of one of the triangles(CPB)) (m)|
|R4||The circumradius of one of the triangles(DPA) (m)|