Calculus
posted by Jake .
Rectangle side is represented by (2,3) and (6,4). Find the perimeter of rectangle.
Could someone please help~

x1 = 2
x2 = 6
y1 = 3
y2 = 4
Length of first side :
a = x1  x2
a = 2  (  6 )
a = 2 + 6 = 8
Length of second side :
b =  ( y1  y2 ) 
b =  3  4 
b =   1 
b = 1
P = 2 ( a + b )
P = 2 ( 8 + 1 )
P = 2 * 9 = 18
Remark :
 
mean absolute value 
Thank you for answering.
Don't I have to find the magnitude then use square root of the answer and multiply by 2? If so, could you show it.