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Angle of corner


Let's move point A.
What will the angle of XAP change?
With which movement will the angle of XAP not change?
With which movement will the angle of XAP change?

GC/Win



  1. : To equate two triangles
  2. : To equate many angles
  3. : Confirming (1)
  4. : Confirming (2)

Forum of Geometric Constructor by Y.Iijima