Testing the diagonals to determine the shape: Match each operation with the correct conclusion we can draw when testing diagonals in a quadrilateral. Test the midpoints and if they are the same then it is a... [Choose ] [Choose] circle Test the slopes of the diagonals and if slopes are negative reciprocals, then it is a... Test the distance of the diagonals, and if they are congruent, then it is a... If all three tests: slope, midpoints, and distance all work out to be true, then we have a .... pentagon rhombus Parallelograms triangle polygon square trapezoid rectangle quadrilateral Test the slopes of the sides, and if we have only one pair of opposite sides parallel then we have a ... [Choose ] If none of the tests hold to be true, then we have a ... [Choose ] ..