Mohr–Mascheroni theorem

In mathematics, the Mohr–Mascheroni theorem states that any geometric construction that can be performed by a compass and straightedge can be performed by a compass alone, although the number of required actions may be almost squared. The result was originally published by Georg Mohr in 1672, but his proof languished in obscurity until 1928. The theorem was independently discovered by Lorenzo Mascheroni in 1797.

See also

• Poncelet-Steiner theorem
• Napoleon's problem

External links

• Construction with the Compass Only
• A short elementary proof of the Mohr-Mascheroni Theorem