Question 681833
Distance between two points			
x1	y1	x2	y2
			
a	0	0	b
d=	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}	

d=	{{{sqrt((b^2-0)^2+(0-a^2)^2)}}}	

d={{{sqrt(b^2-a^2)}}}