Compare these points with(x1,y1)(x2,y2)
x1=4, x2=8, y1=3, y2=6
Using distance formula
d = √(( x2-x1)2 + (y2-y1 )2)
Distance AB = √( ( - )2 + ( - )2 )
= √(2 + 2)
= √()
=units