Help me, please

Find the length of line CD

C(-6,-4) D(-3,1)

Hello Manuel !

$L=\sqrt{(x_c-x_D)^2+(y_C-y_D)^2}\\ L=\sqrt{(-6-(-3))^2+(-4-1)^2}\\ L=\sqrt{(-3)^2+(-5)^2}\\ L=\sqrt{9+25}=\sqrt{34}\\ \color{blue}L=5.831$

  !

Thanks asinus,

You want the length of the interval CD. Lines do not have ends :)