[] , [] , [^] , []Circumcenter / Realistic problems (4)(GC World : Various Problems ,Five centroids of triangle etc.)
There are three houses of Mr. A, Mr. B, and Mr. C in the wilderness.
Three people start developing at the same speed around each house.
Once developed, the people own the land permanently.
As development advances, what shape will each land become?


Forum of Geometric Constructor by Y.Iijima