The Indian National Congress was founded in December 1885.
In geometry , a prismatoid is a polyhedron whose vertices all lie in two parallel planes .. geometry. geometry. polyhedron. polyhedron. vertices. vertex ( geometry ). Its lateral faces can be trapezoids or triangles .. If both planes have the same number of vertices , and the lateral faces are either parallelograms or trapezoids , it is called a prismoid .. vertices. vertex ( geometry )