[ª] , [©] , [^] , [¨]Perpendicular bisectors of four sides of quadrangle / The result is one point/Sets of corresponding points(GC World : Various Problems ,Quadrangle¨Quadrangle)
I want to make EFGH into one point.
What position of point A will make EFGH one point?

GC/Win


Forum of Geometric Constructor by Y.Iijima