Geometry
Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
Philadelphia, Pennsylvania
Philadelphia
is the largest city in Pennsylvania and
the fifth-most-populous city in the
United States.
A commercial, educational, and cultural center, Philadelphia was once the second-largest city in the British Empire (after London), and the social and geographical center of the original 13 American colonies. Source:
Wikipedia,
Philadelphia.
