Construction task 1: Angle in a semi-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.