How to construct a 60 degree angle with compass and straightedge
Construct a Triangle 30°, 60°, 90° given the hypotenuse
How to Construct a 60 Degrees Angle Using Compass and Ruler
Construction of Some Standard Angles (30°, 45°, 60°, 90°, 120° and
Construction of Angles by using Compass, Construction of Angles
How can we draw a 60 degree angle without any protacter - Maths
Construction of Angles Using Ruler and Compass
Constructing An Angle of 60 Degrees - Protractor and Compass
Angle Trisection -- from Wolfram MathWorld
How to Construct a 90 Degrees Angle Using Compass and Ruler
parallelUniverses [licensed for non-commercial use only] / Digital
Why Trisecting the Angle is Impossible