14. Four vertices of a quadrilateral are A(4, 5, 5, 7), B(6, 3, 3, 9), C(5,...

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14. Four vertices of a quadrilateral are A(4, 5, 5, 7), B(6, 3, 3, 9), C(5, 2, 2, 8), D(3, 4, 4, 6). a. Show that the quadrilateral is a rectangle. b. Find the area of the quadrilateral. 14. Four vertices of a quadrilateral are A(4, 5, 5, 7), B(6, 3, 3, 9), C(5, 2, 2, 8), D(3, 4, 4, 6). a. Show that the quadrilateral is a rectangle. b. Find the area of the quadrilateral.