Question 1027498
Length AB 

Distance between two points													
x1	y1	x2	y2										
													
3	0	9	-5										
d=	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
d=	{{{sqrt((		-5	-	0	)^2	+	(	9	-	3	)^2	)}}}
d=	{{{sqrt((		-5	)^2	+	(	6	)^2	)}}}				
d=	{{{sqrt((		61	)  	)}}}								
l(AB)=	7.81												
l(BC)

Distance between two points													
x1	y1	x2	y2										
													
7	-8	9	-5										
d=	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
d=	{{{sqrt((		-5	-	-8	)^2	+	(	9	-	7	)^2	)}}}
d=	{{{sqrt((		3	)^2	+	(	2	)^2	)}}}				
d=	{{{sqrt((		13	)  	)}}}								
l(BC)=	3.61												

l(CA)

x1	y1	x2	y2										
													
7	-8	3	0										
d=	{{{sqrt((y2-y1)^2+(x2-x1)^2)}}}												
d=	{{{sqrt((		0	-	-8	)^2	+	(	3	-	7	)^2	)}}}
d=	{{{sqrt((		8	)^2	+	(	-4	)^2	)}}}				
d=	{{{sqrt((		80	)  	)}}}								
l(CA)=	8.94	

Add up all three lengths											
m.ananth@hotmail.ca