Question: Given points A (2, -1), B (1, 5), C (7, 4), and D (8, -2), prove quadrilateral ABCD is a rhombus. Show your work.

Given points A (2, -1), B (1, 5), C (7, 4), and D (8, -2), prove quadrilateral ABCD is a rhombus. Show your work.

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