<PRE><B>Question 428529</B>
Distance between two points									
x1	y1	x2	y2						
d= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}								
12	8	4	2						
			
d= 	{{{sqrt((2-8)^2	+(4-12)^2)}}}	
d= 	{{{sqrt((-6)^2+(-8)^2)}}}
d= 	{{{sqrt((100)^2	)}}}				
d= 	10								

...
 If the coordinates of A and B are ( x1, y1) and ( x2, y2) respectively, then the midpoint, M, of AB is given by the following formula 									
M ={{{(x1+x2)/2}}}{{{(y1+y2)/2}}}
(	3	,	1	)  	(	7	,	-5	)   				
M =		{{{(x1+x2)/2			}}}	{{{	(y1+y2)/2}}}						
x= 	(	3	+	7	)/	2	y=	(	1	+	7	)/	2
x= 	5		y=	4									

				
			
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