Finding the Distance Between Points
Finding the distance between points is one of those standard algebra problems. It's a straightforward plug and chug operation -- plug the numbers in to the equation and get the answer. If you went running and turned your GPS on, it would be doing something similar to tell you the distance you run.
The formula is ..
..assume you have two points from an xy graph (5, 1) and (4,2). So the x values are 5 and 4 and the y values are 1 and 2. Make x1 = 5 and x2 = 4 and y1 = 1 and y2 = 2. If this is greek to you, look at THIS POST. It's essential that you understand the x,y graph, when it comes to algebra.
The distance formula is .. d = √(x2 - x1)2 + (y2 - y1)2....the square root of all of that stuff.
(x2 - x1) = (4 - 5)2 = 1
(y2 - y1) = (2 - 1)2 = 1
√(1) + (1) = √2...so the answer is the square root of 2
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