Question 567864
x1	y1	x2	y2										
d= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
5sqrt(3)	7sqrt(5)	Sqrt(3)	-sqrt(5)										
d= 	{{{-sqrt(((5)-7sqrt(5))^2+(sqrt(3)-5sqrt(3))^2))}}}
d= 	{{{sqrt((-8sqrt(5))^2+(-4sqrt(3))^2)}}}				
d= 	{{{sqrt((320+48	))}}}	

d= {{{sqrt(368)}}}							
d=19.1

use the mid point formula

M :{{{((x1+x2)/2)((y1+y2)/2)}}}