Solution: According to the question, the coordinates of 4 points form a quadrilateral. This quadrilateral is shown in the below figure Now by making use of the distance formula, we have: This is...
The points A (2, 0), B (9, 1), C (11, 6) and D (4, 4) are the vertices of a quadrilateral ABCD. Determine whether ABCD is a rhombus or not.
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