Points: (-1, -9) and (4, -2)
Distance: (-1-4)2+(-9--2)2 = 74 and the square root of this is the distance which is about 8.602 to 3 decimal places
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Answer: 1
If you mean points of (1, -2) and (-9, 3) then the distance is about 11 units using the distance formula
8.54
If you mean points of (1, -2) and (-9, 3) then it works out as about 11
Not necessarily. The distance between (0.0) and (0.5, 0.5) = 0.7071 (approx).