can anyone help me on this geometry question and explain it?

Answer:
The length of FG is 5.
Step-by-step explanation:
We can use the distance formula to solve.
D = [tex]\sqrt{ (x2 - x1)^{2} + (y2 - y1)^{2} }[/tex]
D = [tex]\sqrt{ (1 - -2)^{2} + (0 - -4)^{2} }[/tex]
D = [tex]\sqrt{ 3^{2} + 4^{2} }[/tex]
D = [tex]\sqrt{ 9 + 16 }[/tex]
D = [tex]\sqrt{25}[/tex]
D = 5