Question 446467
x1	y1	x2	y2										
d(AB)= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
1	7	8	6										
d= {{{sqrt((6-7)^2+(8-1)^2)}}}
d= {{{sqrt((-1)^2+(7)^2)}}}				
d={{{sqrt((50))}}}							
d(AB)=7.07	

x1	y1	x2	y2										
d(BC)= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
8	6	7	-1										
d= {{{sqrt((-1-6	)^2+(7-8	)^2)}}}
d= {{{sqrt((-7)^2+(-1)^2)}}}				
d= {{{sqrt((50))}}}							
d(BC)=7.07										
x1	y1	x2	y2										
d(AC)= 	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
1	7	7	-1										
d= {{{sqrt((-1-7)^2+(7-1)^2)}}}
d= {{{sqrt((-8)^2+(6)^2)}}}				
d= {{{sqrt((100))}}}							
d= 	10.00												
Perimeter = d(AB)+d(BC)+d(CA)=7.07+7.07+10
==24.14