As shown at the graph :
the coordinates of point C is (8,2)
The coordinates of point D is (4, -2)
The distance CD is d can be found from the following formula:
[tex]\begin{gathered} d=\sqrt[]{(x2-x1)^2+(y2-y1)^2} \\ d=\sqrt[]{(8-4)^2+(2-(-2)^2}=\sqrt[]{4^2+4^2}=\sqrt[]{16+16}=\sqrt[]{32}=4\sqrt[]{2} \end{gathered}[/tex]the distance CD = 4√2 = 5.657 (to the nearest 3 decimals)
