Answer:
D
Step-by-step explanation:
Using the distance formula
d = [tex]\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex]
with (x₁, y₁ ) = A (1, 2 ) and (x₂, y₂ ) = B (7, 2 )
d = [tex]\sqrt{(7-1)^2+(2-2)^2}[/tex]
= [tex]\sqrt{6^2+0^2}[/tex]
= [tex]\sqrt{36+0}[/tex]
= [tex]\sqrt{36}[/tex]
= 6
