How To Use Distance Formula

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Given two points $(x_1,y_1)$ and $(x_2,y_2)$ on the plane, the distance between these two points is the length of the line segment connecting the two points. By using the Pythagorean's theorem one can derived that the distance between the two points is given by

$d:=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

The videos below will demonstrate how to derive this formula as well how to apply this formula

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