Question 418665
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
D = {{{sqrt ((x1-x2)^2+(y1-y2)^2))}}}
A(-1, 1) and 
B( 3, 1)  d = {{{sqrt((-4)^2 + 0^2)}}} = sqrt(16) = 4 units, the length of side s
 Area(square) = s*s = 4 * 4 = 16 units squared
{{{drawing(300,300,   -6, 6, -6, 6, grid(1),
circle(-1, 1,0.3),
circle(3, 1,0.3),
line(-1,1,3,1), graph( 300, 300, -6, 6, -6, 6))}}}