# How to find the opposite side of the Earth?

Good evening fellow friends!

Who rummages in cartography or mathematics, tell me how knowing the coordinates (lat, lon) point on the map (say Rome) to find a point on the opposite side of the Earth (the line from Uryupinsk, through the center of the Earth, and come out the other side). How to find the coordinates of the exit?
July 12th 19 at 16:54