you can use the formula to find the distance between two points
remember
Let
[tex]\begin{gathered} P1(x_1.y_1) \\ P2(x_2,y_2) \end{gathered}[/tex]the distance between P1 and P2 is
[tex]d=\sqrt{(x_2-x_1_{})^2+(y_2-y_1)^2}[/tex]Step 1
Let
P1=C(7,2)
P2=D(4,2)
Step 2
replace to find d
[tex]\begin{gathered} d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} \\ d=\sqrt{(2-2)^2+(4-7)^2} \\ d=\sqrt{-3^2} \\ d=\sqrt{9} \\ d=3 \end{gathered}[/tex]so, the length of line segment CD is 3 units
Have a great day
