# Mascheroni's Construction of the Center of a Circle

Mascheroni's Construction of the Center of a Circle

How do you find the center of a circle with compass alone? Lorenzo Mascheroni found this beautiful and easy construction in 1797. He did not know that Dane G. Mohr had already discovered it in 1672. This Demonstration decomposes the steps of the construction. You start with two points. Justifying the result is not trivial, even with the help of the figure.