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The area of a rectangle can be found by multiplying the length and width of the rectangle.
Using the coordinates of points A and B, we can calculate the length of the rectangle:
Length = |5 - 2| = 3 miles
Using the coordinates of points A and D, we can calculate the width of the rectangle:
Width = |-5 - (-1)| = 4 miles
Therefore, the area of the rectangle ABCD is:
Area = Length x Width
Area = 3 miles x 4 miles
Area = 12 square miles
So, the area of rectangle ABCD is 12 square miles.