## Mascheroni Theorem

Prove that any geometric construction that can be done with the compass and the straighthedge, can be drawn using only the compass alone.

Prove that we can find the center of a given circle using only a compass.

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Categories: Geometry, Problem Solving

There is an extensive write-up on the Mascheroni Theorem.

And it’s at

http://www.cut-the-knot.org/do_you_know/compass.shtml