Question

can someone let me know how they got the square roots that they did by the coordinates?

Answer 1

they most likely used the distance formula

\[\sqrt{(x2-x1)^2+(y2-y1)^2}\]

\[\sqrt{(1-(-6))^2+(2-1)^2}\] = sqrt(50) = sqrt(25*2) = 5sqrt(2) for DE

Answer 2

oh, thank you