Pappus's centroid theorem
THEOREM THAT, FOR A SOLID OF REVOLUTION OF A PLANAR FIGURE, THE SURFACE AREA EQUALS THE FIGURE’S PERIMETER TIMES THE DISTANCE THE PERIMETER’S CENTROID TRAVELS, AND THE VOLUME EQUALS THE FIGURE’S AREA TIMES THE DISTANCE THE FIGURE’S CENTROID TRAVEL
Pappus-Guldinus theorem; Guldinus theorem; Theorem of Pappus; First theorem of pappus; Pappus centroid theorem; Pappus–Guldinus theorem; Theorem of papus; Theorem of Papus
In mathematics, Pappus's centroid theorem (also known as the Guldinus theorem, Pappus–Guldinus theorem or Pappus's theorem) is either of two related theorems dealing with the surface areas and volumes of surfaces and solids of revolution.