Answer:
A) Distance Formula
Step-by-step explanation:
|AB| is the magnitude of segment AB.
AB is one side of rectangle ABCD.
To find the length of this segment, we use the distance formula;
The distance formula is given as:
[tex]|AB|=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
The correct answer is A
