They are the four reference points in a Cartesian plane. Different points of location or orientation every 90° at the circumference. Use is widespread around the world as well: 0° North ( 12:00 on the clock ) 90° 40 East; 03:00 ) 180° South ( 06:00 ) and 270° West ( 09:00 ). Another way to establish them is by placing the right hand to the East ( sunny ) , the left hand 40 West; where the Sun ) to the front is the North and South back.
