Mass point geometry theorem for SSC CGL 

Definition :

Mass point geometry, colloquially known as mass points,
is a geometry problem-solving technique which applies the physical principle
 of the center of mass to geometry problems involving triangles and intersecting cevians.
though modern mass point geometry was developed in the 1960s
 by New York high school students  the concept has been found to have been used as early as 1827 by August Ferdinand Möbius in his theory of homogeneous coordinates.

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