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