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on a standard coordinate plane, what is the distance between the two points(8,4) (5,-2)

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1 Answer

Use the distance formula
 
x2 = 8
x1 = 5
 
y2 = 4
y1 = -2
 
Sqrt(    (x2 - x1)2 +  (y2 - y1)2    )
 
Sqrt(        (8 - 5 )2   + (4 - (-2))2      )
 
Sqrt( 32 + 6)
 
sqrt (9 + 36)
 
sqrt(45)
 
sqrt(9) * sqrt(5)
 
3 sqrt(5) or 3√5