square root(x2-x1)squared+(y2-y1)squared
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how do you find distance between points
Yes it is true
There are many things which are depend on coordinate geometry, for example when a person or government wants to find where a place is situated, or the location of a person, longitude and latitude coordinates can be used to find them. The whole globe is based on longitude and latitude - where the lines of longitude and latitude meet is a coordinate.For example, it is possible to find the longitude and latitude of a place and then use those coordinates to find the place on a map. The location could also be put into a sat-nav device which uses its current longitude and latitude coordinates to work out a route to the destination - all in little steps between different coordinates.
It is used, except that, because one set of coordinates are the same, the formula collapses into a simpler form.
since you know of one points and the halfway point between the other point. just multiply the halfway point by 2 and this is the total distance between the two points.