Center Earth

Center Earth

How to find the angle between two points on the surface of the earth with the center?

What is the formula to find the angle? Assuming that is the angle of two lines with two reaching the center of the land of the two cities.

We can make a formula that works in this situation. If we imagine the earth as a perfect circle, and cities in the circle itself. We must assume that the earth is a perfect circle, so if we draw a line in the center each city, the distance is the same. The circumference of the Earth (or any circle) is 2 * pi * R. This distance is good for the entire 360 degree circle. In part of the circle, then it depends on the angle that spans the arc. Thus, if the arc (distance between cities) and angle (it what 're looking for) are configured in a relationship and over the whole circle, we can say the following: * pi = R/180 ARC / theta Now This shows us that we need two pieces of information - the radius of the Earth (possibly Google) and the distance between cities (again, Google that too). Assuming that we know that these two values, then You Can solve for the angle theta: theta = (180 * arc) / (pi * r)

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