![]() In Euclidean space, the sum of the angles of a triangle equals 180º and squares have all their angles equal to 90º always. The Euclidean space or Euclidean geometry is what we all usually think of 2D space is before we receive any deep mathematical training in any of these aspects. Since this is a very special case, from now on we will talk only about distance in two dimensions. If you wish to find the distance between two points in 1D space you can still use this calculator by simply setting one of the coordinates to be the same for both points. For each point in 2D space, we need two coordinates that are unique to that point. These points are described by their coordinates in space. To find the distance between two points, the first thing you need is two points, obviously. If you are looking for the 3D distance between 2 points we encourage you to use our 3D distance calculator made specifically for that purpose. For this calculator, we focus only on the 2D distance (with the 1D included as a special case). In most cases, you're probably talking about three dimensions or less, since that's all we can imagine without our brains exploding. If we stick with the geometrical definition of distance we still have to define what kind of space we are working in. You will see in the following sections how the concept of distance can be extended beyond length, in more than one sense that is the breakthrough behind Einstein's theory of relativity. This definition is one way to say what almost all of us think of distance intuitively, but it is not the only way we could talk about distance. The most common meaning is the /1D space between two points. Before we get into how to calculate distances, we should probably clarify what a distance is.
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