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1. Constructing an angle of 60 degrees.
2. How to construct a tangent to a circle at a given point on it.
3. How to construct a parallelogram, given the legths of the sides and the measures of the angles.
4. How to construct the circumcircle of a given triangle.
5. How to construct the incircle of a given triangle.
6. How to construct the centroid of a triangle.