Question 521345
Distance between two points													
x1	y1	x2	y2										
d= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
-9	-15	-11	-8										
d= 	{{{sqrt((-8--15	)^2+(-11-(-9)	)^2	)}}}
d= 	{{{sqrt((7)^2	+(-2	)^2	)}}}				
d= 	{{{sqrt((		53	)  	)}}}								
d= 	7.280												
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