PLZ HELP Given quadrilateral ABCD, if diagonals AC and BD bisect each other, and angle ABC=91°, but you know nothing about any lengths in the diagram, what special figure MUST ABCD be? A rhombus or a parallelogram? HOW DO YOU KNOW.

PLZ HELP Given quadrilateral ABCD if diagonals AC and BD bisect each other and angle ABC91 but you know nothing about any lengths in the diagram what special fi class=