SOLUTION: Find the distance between (10, 0) and (–10, 0). How do I do these ones again?

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Question 82056: Find the distance between (10, 0) and (–10, 0).
How do I do these ones again?
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
You apply the distance formula:d+=+sqrt%28%28x%5B2%5D-x%5B1%5D%29%5E2%2B%28y%5B2%5D-y%5B1%5D%29%5E2%29
The two given points are:
(10, 0) and (-10, 0) so...
x%5B1%5D+=+10, y%5B1%5D+=+0 and
x%5B2%5D+=+-10, y%5B2%5D+=+0
Making the appropriate substitution:
d+=+sqrt%28%28-10-10%29%5E2%2B%280-0%29%5E2%29
d+=+sqrt%28%28-20%29%5E2%29
d+=+sqrt%28400%29
d+=+20