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# What is the distance between the points -1 1 and 1 -1?

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The distance between the points can be calculated by using the difference in the x coordinates, the difference in the y coordinates and Pythagoras.

distance = sqrt((difference_in_x_coords)2 + difference_in_y_coords)2)

So for the points (-1, 1) and (1, -1) the distance between them is:

sqrt((-1 - 1)2 + (1 - -1)2)
=sqrt(22 + 22)
=sqrt(4 + 4)
= sqrt(8)
~= 2.83
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