The international date line roughly follows the 180o meridian down the middle of the Pacific Ocean.
In the middle of the Pacific Ocean,somewhere near Howland Island.
The pacific as a long ridge runs down the middle due to plate movement
Yes, every isosceles triangle has at least one line of symmetry, usually drawn down the middle from the top point, down in the middle of the triangle's base.
It was perfered to as a line of demarcation .
In the middle of the South Pacific Ocean. (on the international date line)
Yes. It runs between Alaska and Russia, and goes straight down to Antarctica.
"middle" is very arbitrary If you use the currently defined Prime Meridian as the starting point then the "middle" could be at 180° - - - which runs mostly through the Pacific Ocean. If you are looking down on the North Pole, then the Arctic Ocean is in the middle. If you run around the equator, then the Atlantic, Pacific, and Indian oceans lie in the middle. If you consider the middle to be the center of the Earth, then I don't think you could consider what occupies that space as a "sea". We believe the center of the Earth is solid.
The line where a new day begins is the International Date Line, running down the middle of the Pacific Ocean from pole to pole.
It was as a result of the Treaty of Tordesillas (signed June 7th 1494) and was referred to as the line of demarcation.
There are several US state flags that have reflectional symmetry if a line of symmetry is drawn vertically down the middle. Alabama, Arizona, New Mexico and Indiana all have symmetry.
You go to a hill and press down.
The left Pacific and The right and up and down Pacific Oceans