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cos²a+sin²a=1 Pythagoras augmented

Author:Arjen Dijksman

Topic:Angles, Area, Circle, Circumcircle or Circumscribed Circle, Cosine, Geometry, Incircle or Inscribed Circle, Pythagoras or Pythagorean Theorem, Rectangle, Right Triangles, Special Points, Square, Surface, Geometric Transformations, Triangles, Trigonometry, Unit Circle

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