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Harriot's first half-Moon observation (elongation)

Author:A. G. Gomez (agg29@ou.ac.uk)
Topic:Angles

New Resources

  • apec
  • Parallel lines, Transversals and Segments
  • 巧算長方形周界
  • Perimeter of a Rectangle with Unknown Sides
  • Circumference of a unit circle

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  • Real Numbers
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  • Centroid or Barycenter
  • Coordinates
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