1. The problem asks which property is NOT common between a rectangle and a square. 2. Let's analyze each statement: - Both have perpendicularly bisecting diagonals: Squares have diagonals that bisect each other at right angles (perpendicular), but rectangles do not necessarily have perpendicular diagonals. - Both have two pairs of parallel sides: Both rectangles and squares have two pairs of parallel sides. - Both have four right angles: Both rectangles and squares have four right angles. - Both have congruent diagonals: Both rectangles and squares have diagonals of equal length. 3. Therefore, the property that is NOT common is "Both have perpendicularly bisecting diagonals" because only squares have this property, not all rectangles. Final answer: Both have perpendicularly bisecting diagonals is NOT common to both shapes.