SOLUTION: I'm trying to prove the distance formula for the distance between two points in 3 space. I know in 2-dimensional space how to go about this, but how do I expand it to 3-dimensions

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Question 149643: I'm trying to prove the distance formula for the distance between two points in 3 space. I know in 2-dimensional space how to go about this, but how do I expand it to 3-dimensions? Do I need to go through the Pythagorean theorem twice? Any nudge in the right direction would be most appreciated.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
nudge --> http://www.easycalculation.com/analytical/learn-distance3.php