Monge's Problem
Draw a Circle that cuts three given Circles Perpendicularly. The solutionis obtained by drawing the Radical Center 
of the given three Circles. If it lies outside thethree Circles, then the Circle with center and Radius formed by the tangent from to one of thegiven Circles intersects the given Circles perpendicularly. Otherwise, if liesinside one of the circles, the problem is unsolvable.
References
Dörrie, H. ``Monge's Problem.'' §31 in 100 Great Problems of Elementary Mathematics: Their History and Solutions. New York: Dover, pp. 151-154, 1965.
- Scientific Notation
- s-Cluster
- Score Sequence
- Screw
- Screw Theorem
- Scruple
- Sea Horse Valley
- Searching
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- Seashell
- Secant
- Secant Line
- Secant Method
- Secant Number
- Sech
- Second
- Second Curvature
- Second Derivative Test
- Second Fundamental Tensor
- Sectional Curvature
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- Sector
- Sectorial Harmonic