Carnot's theorem

Carnot's theorem or Carnot's principle (, ) may refer to:

In geometry: Carnot's theorem (inradius, circumradius), describing a property of the incircle and the circumcircle of a triangle Carnot's theorem (conics), describing a relation between triangles and conic sections Carnot's theorem (perpendiculars), describing a property of certain perpendiculars on triangle sides

In physics: Carnot's theorem (thermodynamics), setting a maximum efficiency obtainable from a heat engine

See also Carnot cycle, in thermodynamics