land surveyors as directed by political agreements
1. Colorado 2. Utah 3. New Mexico 4.Wyoming EDIT: Actually there are only three since the New Mexico/Texas border near El Paso is not straight.
A way to control people, government, economy, unity, and to set off land from other groups of people. As well borders are used to set protections of the people that are inside the borders from those outside the borders from attempting to take over their property.
They were not dug in straight lines, because both sides used artillery to bombard one another. If an artillery shell hit a trench in a straight line it could wipe out a lot of soldiers, as the its blast could not be contained. A trench is made in that jaggerd format because if an artillery shell hits the trench it can be stopped by the structure and walls of the trench. The explosion in a straight line can get a lot futher than if a wall is in the way. Also the structure can be complicated to confuse the enemy if they ever manage to get into the trench.
Canal
The Berlin Conference which took place in the late 19th century determined many of the borders of present day Africa. Most of the borders were arbitrary and made little sense relating to potential conflict.
lakes
Rivers
because god made them that way
because god made them that way
Some borders are made by natural features, such as rivers. Other times, there might be a straight line determined by geographical latitude or longitude.
WY and CO
if you mean which countries have borders that are entirely made up of straight lines like say the state of Utah then none but if you mean which countries have borders that include at least some lines that are entirely or perfectly straight then probably all or nearly all A few examples like Papua New Guinea and Egypt do however come close to entirely straight borders Land borders are defined by border markers. These are placed by mutual agreement by the two countries and mark out the border. They can be anything from a few tens of metres apart to a few Km apart. Normally they are within sight of each other. The border is deemed to run in a straight line from on border marker to another. Most borders are therefore a large number of relatively short straight lines, and most borders are defined by straight lines. This does not apply to borders which run along rivers or lakes. in this case the border is normally the centre of the river, which is not a straight line. Note a line of latitude (xx °N or yy °S) is not a straight line.
Because of state borders. Why is California so big? Because people made state borders and Rhode Island is small because of it.
Many states in the Western US had their borders made along lines of latitude and longitude resulting in straight borders. This was done because the areas that became states were sparsely populated and often not entirely explored. So that a costly exploration and mapping of the borderlands to find a suitable boundary could be avoided, the people in charge of the states simply marked borders along lines they knew the existence of.
Suez canalNone
well, here is the answer. If you are doing this for a homework thingy, listen to me.. it is because the borders were once just made on the land, and then the states were made to overlap eachother!!!!
DNA is twisted because that is the way the bonds cause it to form. Some things are just the way they are because of the way they are made.