distance betweeen (x1,y1) and (x2,y2) is
[tex] \sqrt{(x_2-x_1)^2+(y_2-y_1)^2} [/tex]
(5,1) and (0,-5)
(x,y)
x1=5
y1=1
x2=0
y2=-5
D=[tex] \sqrt{(0-5)^2+(-5-1)^2} [/tex]
D=[tex] \sqrt{(-5)^2+(-6)^2} [/tex]
D=[tex] \sqrt{25+36} [/tex]
D=[tex] \sqrt{61} [/tex]
the distance is √61
