Answer:
1 unit
Step-by-step explanation:
If point J is the midpoint of segment FG with endpoints F(1,4) and G(5,12), then its coordinates are
[tex]x_J=\dfrac{x_F+x_G}{2}=\dfrac{1+5}{2}=3\\ \\y_J=\dfrac{y_F+y_G}{2}=\dfrac{4+12}{2}=8[/tex]
If point K is the midpoint of segment GH with endpoints G(5,12) and H(-1,4), then its coordinates are
[tex]x_K=\dfrac{x_G+x_H}{2}=\dfrac{5+(-1)}{2}=2\\ \\y_K=\dfrac{y_G+y_H}{2}=\dfrac{12+4}{2}=8[/tex]
The measure of JK is
[tex]JK=\sqrt{(3-2)^2+(8-8)^2}=\sqrt{1^2+0^2}=1\ unit[/tex]
