Which of the following statements is not correct?

(1) The angular distance of a point on the earth's surface from the center of the earth is referred to as its latitude. 

(2) The angular distance along the equator east or west of the Prime Meridian is referred to as its longitude. 

(3) Latitude is also called Meridians.

(4) The Prime Meridian was decided as the zero meridians which pass through the royal astronomical observatory at Greenwich near London in 1884.