Answer:
D √58
Step-by-step explanation:
Draw lines from Points A and B to Point C at (8, 4).
∆ABC is a right triangle.
AC = x₂ - x₁
= 8 - 1
= 7
BC = y₂ - y₁
= 4 - 1
= 3
AB² = AC² + BC²
= 7² + 3²
= 49 + 9
= 58 Take the square root of each side
AB = √58
