SOLUTION: Find the distance between the pair of points (4,9) and (13,21)

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Question 1074107: Find the distance between the pair of points (4,9) and (13,21)
Answer by ikleyn(52781) About Me  (Show Source):
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Take the difference of x-coordinates: dx = 13 - 4 = 9.


Take the difference of y-coordinates: dy = 21 - 9 = 12.


Now the distance is sqrt%28%28dx%29%5E2+%2B+%28dy%29%5E2%29%29 = sqrt%289%5E2+%2B+12%5E2%29 = 15.