[ª] , [©] , [^] , [¨]Area of triangle which inscribes in a circle / Decoding the meaning of additional line(GC World : Various Problems ,MaxEMin)
A, B, and C are on a circle O.
When will the area of ĢABC be maximized?
What is the meaning of this line?

GC/Win


Forum of Geometric Constructor by Y.Iijima