Rectangle ABCDABCDA, B, C, D is graphed in the coordinate plane. The following are the vertices of the rectangle: A(-8, -6),A(−8,−6),A, left parenthesis, minus, 8, comma, minus, 6, right parenthesis, comma B(-3,-6)B(−3,−6)B, left parenthesis, minus, 3, comma, minus, 6, right parenthesis, C(-3, -4)C(−3,−4)C, left parenthesis, minus, 3, comma, minus, 4, right parenthesis, and D(-8, -4)D(−8,−4)D, left parenthesis, minus, 8, comma, minus, 4, right parenthesis.
Given these coordinates, what is the length of side ABABA, B of this rectangle?
units