Because they come from different directions, the southeast and northwest in life refer to four directions. In terms of space, the direction facing Polaris is north, the back is south, the right hand is east, and the left hand is west;

_ е е е е е е е е е е е е е е е е е? In two-dimensional coordinates, that is, the positive direction of abscissa is east, the reverse direction is west, and the positive direction of ordinate is north and the reverse direction is south.

_ The shore topic is thin, but the mother is not good at it. What's wrong with it? What happened to J Street? 28 constellations, called 28 nights. The ancients divided the 28 stars into four palaces according to their directions, and the position of each palace was named southeast and northwest.