* Latitudes: There are actually 180 lines of latitude, but they range from 0° (the equator) to 90° North and 90° South. Each degree is then further subdivided into 60 minutes, and each minute into 60 seconds. So, there are infinitely many points along each latitude line.
* Longitudes: While there are 360 lines of longitude that encircle the Earth, they are not limited to whole numbers. Like latitudes, each degree is subdivided into minutes and seconds, allowing for infinite points along each longitude line.
So, why are there 360 degrees of longitude and 180 degrees of latitude?
* Longitude: The Earth rotates on its axis once every 24 hours. This rotation is what defines a day. Since there are 360 degrees in a circle, each rotation of the Earth corresponds to a movement of 360 degrees. To simplify measurement, we divide the Earth into 360 degrees of longitude, with each degree representing 1/360 of the Earth's rotation.
* Latitude: Latitude is measured relative to the equator, which is an imaginary circle that divides the Earth into the Northern and Southern hemispheres. The poles are 90° from the equator, and each degree of latitude represents 1/90 of the distance between the equator and a pole.
Therefore, the 180 degrees of latitude and 360 degrees of longitude are simply convenient units of measurement for describing locations on the Earth's surface.
