Posted by Claire on Monday, August 22, 2011 at 6:46pm.
Find the distance between points (2,1) and (1,5)
When finding the distance between these 2 points would you subtract 1(2) or 21? The same question with the other one as well.

Geometry  drwls, Monday, August 22, 2011 at 7:23pm
In answer to your question, you can do it either way, because the numbers get squared anyway.
sqrt[(51)^2 + (1 (2))^2] = sqrt[16 + 9) = 5

Geometry  CP, Monday, August 22, 2011 at 7:32pm
Would it matter in any other case though???

Geometry  drwls, Monday, August 22, 2011 at 7:34pm
Yes, it matters if you want the slope of the line between the points. Then you must use either
(y2 = y1)/(x2  x1) or (y1  y2)/(x1  x2).

Geometry  CP, Monday, August 22, 2011 at 7:36pm
But if you're not trying to find the slope it wouldn't matter right?

Geometry  drwls, Monday, August 22, 2011 at 7:37pm
For the distance between points, it doesn't matter.

Geometry  CP, Monday, August 22, 2011 at 7:38pm
Alrighty! Thanks so much! (:
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