Geometry

Question Analysis：
This question tests knowledge of both universal and special-case properties of parallelogram diagonals, using a "false statement" format.
The main focus is identifying incorrect generalizations.

Key Concept Explanation:
In a parallelogram, diagonals bisect each other, so all four triangles have equal area.
Only rectangles (and squares, a subset) have congruent diagonals.
Diagonals are perpendicular in rhombuses (including squares), not just squares.
The parallelogram law:

Step-by-Step Solution：
A) True: In a parallelogram, diagonals bisect each other, so all four triangles have equal area (

Click "Show Answer" to reveal the answer and analysis