**9.2 Latitudes**

**1.**The great circle which is perpendicular to the earth’s axis is called

**equator**.

**2.**A latitude is the angle at the centre of the Earth which is subtended by the arc of a meridian starting from the Equator to the parallel of latitude.

**3.**A circle which is perpendicular to the Earth’s axis and parallel to the equator is called a

**parallel of latitude**.

**4.**The latitude of the Equator is 0

^{o}.

**5.**All points on a parallel of latitude have the same latitude.

**Example:**

Latitude of

*D*is 30^{o}N.
Latitude of

*E*is 45^{o}S.**Difference between Two Latitudes**

**1.**If

**both parallels of latitude are on the north (or south)**of the equator,

**subtract**the angles of latitudes.

**2.**If

**both parallels of latitude are on the opposite sides**

**of the equator**,

**add**the angles of the latitudes.