180 degrees because a whole circle is 360!!!
You would cross 90 degrees of latitude to travel halfway around the world. Each degree of latitude represents approximately 69 miles (111 kilometers), so half of the Earth's 180 degrees of latitude is 90 degrees.
180° is halfway around a circle or a sphere. Beginning at the Prime Meridian, you can travel EITHER east OR west, and after you have traveled 180 degrees, you'll arrive at the same line either way ... the meridian of 180° E and W longitude, which is halfway around the Earth in either direction from the Prime Meridian.
It could be, but it never is. If you start at zero and travel 210 degrees of longitude in one direction, that brings you to the place that you could have reached by traveling only 150 degrees in the other direction. Halfway around is 180 degrees, so that's as high as longitude is ever marked, because if you go more than 180 degrees, then it would have been shorter to go less than 180 degrees the other way.
All the way around anything is a trip of 360 degrees. If you do it again, your total doubles to 720 degrees.
If you travel all the way around the earth without touching the north or south pole, then you travel through 360 degrees of longitude. They're labeled (zero -- 180) east and (zero -- 180) west.
Because when you travel in longitude, you can go all the way around the Earth, 360 degrees, crossing new longitudes all the way . But when you travel in latitude, the farthest you can travel is from one pole to the other pole ... halfway around the Earth, 180 degrees. Once you reach the opposite pole, if you keep going farther, you're just crossing latitudes that you've already crossed once.
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
If you go all the way around exactly once, and return exactly to your starting point, you've covered 360 degrees of longitude.
The north pole is 90 degrees north latitude. The south pole is 90 degrees south latitude. When you travel from one pole to the other, you go through 180 degrees of latitude. Which isn't so surprising, since that trip takes you halfway around the world.
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
Yes.
The earth is almost spherical. So if you travel north from the equator you are on a circular path (a line of longitude), and distance around a circle is measured in degrees. The north pole is at 90 degrees north (so 60 degrees is two thirse the way). Similarly if you travel east, you are going around a circle parallel to the equator. Zero degrees is traditionally at Greenwich in London, England. So 50 degrees east is 50 degrees around this circle (of latitude). All lines of longitude meet at the poles. All lines of latitude are parallel to the equator (which is zero latitude).