Geo: topic 3- parallelograms 1pt a rhombus is a parallelogram with all four sides of equal length. one way to determine if a given parallelogram is a rhombus is to test whether its diagonals are perpendicular. the vertices of a parallelogram are m(−1,2), n(9,2), p(3,−6), and q(−7,−6). determine whether the parallelogram is a rhombus by checking to see if the diagonals are perpendicular. what is the slope of mp¯¯¯¯¯¯? what is the slope of nq¯¯¯¯¯¯? are diagonals mp¯¯¯¯¯¯ and nq¯¯¯¯¯¯ perpendicular? is the parallelogram a rhombus?