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# what is the distance formula again?

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Oct 1, 2017

#1
+7348
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I never could remember the distance formula either.....until I finally understood where it came from!

Here's a video that explains it:  https://www.youtube.com/watch?v=nyZuite17Pc

Also, I remember this answer from a while back:  https://web2.0calc.com/questions/i-needs-help_1

If you dont want to look at those answers  (you really should!!!!) ...the short answer is.........

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

.
Oct 1, 2017
edited by hectictar  Oct 1, 2017

#1
+7348
+1

I never could remember the distance formula either.....until I finally understood where it came from!

Here's a video that explains it:  https://www.youtube.com/watch?v=nyZuite17Pc

Also, I remember this answer from a while back:  https://web2.0calc.com/questions/i-needs-help_1

If you dont want to look at those answers  (you really should!!!!) ...the short answer is.........

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

hectictar Oct 1, 2017
edited by hectictar  Oct 1, 2017
#2
+1

Thank you soooooooo much, I will for sure watch them. <3

Guest Oct 1, 2017
edited by Guest  Oct 1, 2017
#3
+2337
+2

I always remember this formula as the square root of the sum of the difference of the x-coordinates squared and the difference of the y-coordinates squared.

For me, knowing how to say the formula in words is better than knowing that the distance formula is "the square root of xminus xall to 2nd power plus y1 minus y2 to the 2nd power.

The same applies for the midpoint formula.

I remember it as the ordered pair of the average of the x-coordinates and y-coordinates.

TheXSquaredFactor  Oct 2, 2017