Question 209203
Distance  =  sqrt{ (y2-y1)^2 + (x2-x1)^2]
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for  (-4,6)  and  (-1,5)
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d= sqrt{ 6-5)^2 + (-4-(-1))^2}
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d=sqrt{ 1 +9}
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d=sqrt10 = 3.16
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