Question 451149
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
Find the perimeter of the triangle, round to the nearest tenth
D = {{{sqrt ((x[1]-x[2])^2+(y[1]-y[2])^2))}}}
(-3,4),
(-1,-2) L[1]) = {{{sqrt( (-2)^2 + 6^2)= sqrt(40)}}} 
(3,-1)  L[2] = {{{sqrt((-4)^2 + (-1)^2) = sqrt(17)}}}
(-3,4)  L[3] = {{{sqrt( 6^2 + (-5)^2) = sqrt(61)}}}
 L[1] + L[2] + L[3] = 18.3 (nearest tenth)