A square is a quadrilateral with two pairs of parallel opposite sides, consecutive sides that are perpendicular, and all sides congruent, meaning they have the same length.
Quadrilateral [i]ABCD[/i] has vertices [i]A[/i] (–1, 2), [i]B[/i] (1, 5), [i]C[/i] (4, 3), and [i]D[/i] (2, 0).
Determine if this quadrilateral is a square.
