Find the perimeter of triangle abc. 9 sqrt 84 9 sqrt 2-sqrt 82 18+sqrt 82 none of the above. the coordinates of the triangle are (2,2) (6,6) (7,-3)

By definition, the perimeter of the triangle is the sum of its sides.
 We must then use the formula of distance between points:
 
 We now look for the longitus for each of the sides:
 
 For L1:
 
 
 

 For L2:
 
 
 

 For L3:
 
 
 
 Then, the perimeter is given by:
 P = L1 + L2 + L3
 Substituting values we have:
 

 
 the perimeter of triangle ABC is:
 none of the above.