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Angles in a quadrilateral add up to 360°

Author:John Tranter
Topic:Angles, Geometry
Drag the points to see how the angles change.

New Resources

  • Right Triangle Inscribed in a Semicircle
  • Midpoint Theorem (V2): Integer Solutions
  • Angle Addition Postulate (V2) - Integer Solutions
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Discover Topics

  • Statistical Characteristics
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