The quadrilateral ABCD has the coordinates A(4,3), B(8,9), C(12,3), D(8,-3). What is the relationship of the diagonals? What type of quadrilateral best describes this shape? Prove by finding the lengths and slopes of the two diagonals. Slope of diagonal AC= Slope of diagonal DB= Length of diagonal AC= Length of diagonal DB= What is the relationship of the diagonals? What type of quadrilateral best describes this shape?

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