14.1 Distance formula: d = (x2x1)2+(y2y1)2\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Distance formula: d = (x2x1)2+(y2y1)2\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

In this lesson, we will learn how to use the distance formula to calculate the distance between two points on a graph when you know the coordinates of both points. Distance formula is actually derived from a very basic concept that we learned in geometry: Pythagorean Theorem, a2+b2=c2{a^2} + {b^2} = {c^2}.


  • 1.
    Determine the distance between each pair of points.
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Distance formula: d=(x2x1)2+(y2y1)2d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

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