What is the length of side AB? Round your answer to the nearest tenth.

Answer:
AB ≈ 2.8 units
Step-by-step explanation:
Calculate the length using the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = A(1, 1) and (x₂, y₂ ) = B(3, 3)
AB = [tex]\sqrt{(3-1)^2+(3-1)^2}[/tex]
= [tex]\sqrt{2^2+2^2}[/tex]
= [tex]\sqrt{4+4}[/tex]
= [tex]\sqrt{8}[/tex] ≈ 2.8 units ( to the nearest tenth )