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Construction task 1: Angle in a semi-circle

Author:
GeoGebra Institute of MEI
Topic:
Circle

Construction steps

  1. Use Semi-Circle Through 2 Points (6th menu) to add a semi-circle to the screen end-points A and B.
  2. Use Point (2nd menu) to add a new point on the circle, C.
  3. Use Segment (3rd menu) to create segments AB, AC and BC.
  4. Use the Angle tool (8th menu) to measure the angle ACB.

Related Topics

  • Area
  • Perimeter
  • Polygons
  • Quadrilaterals
  • Special Points

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