Question 842172
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Hi,
Distance between two points (x1,y1) and (x2,y2) is:
D = {{{sqrt ((x[1]-x[2])^2+(y[1]-y[2])^2))}}}
p1=(-1,3) 
p2=(5,4)  d = {{{sqrt((3-4)^2 + (-1-5)^2) = sqrt((-1)^2 + (-6)^2) = sqrt(37)}}} 
0r
p2=(5,4)
p1=(-1,3) d = {{{sqrt((5-(-1))^2 + (4-3)^2) = sqrt((6)^2 + (1)^2) = sqrt(37)}}} 
Note: the Right Triangle Formed:
Applying the Pythagorean Theorem to find length of the blue line
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
circle(-1, 3,0.2),
circle(5, 4,0.2),
blue(line(-1,3,5,4)),
red(line(5,4,5,3)),
green(line(-1,3, 5,3)),
graph( 300, 300, -6, 6, -6, 6))}}}