Distance Between 2 Points = sqr root [(X2 -X1)^2 +(Y2 -Y1)^2]
Distance Between 2 Points = sqr root [(2 -1)^2 + (4--2)^2]
Distance Between 2 Points = sqr root [1 + 36]
Distance Between 2 Points = sqr root [ 37 ]
Distance Between 2 Points = 6.082762530298219
Source:
1728.com/distance.htm