Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
Francisco is the fourth most populous
city in California and the 13th most
populous city in the United States, with
a 2010 estimated population of 805,235.
The only consolidated city-county in
California, it encompasses a land area of 46.7 square miles
on the northern end of the San Francisco
Peninsula, giving it a density of 17,243
people per square mile . San Francisco is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of more than 7.4 million people which includes San Jose and Oakland.