Geometry

Question Analysis
This question involves determining whether a given statement is a valid biconditional statement.
The main focus is on verifying the logical validity of both parts of the statement.

Key Concept Explanation:
A biconditional statement requires both the original statement and its converse to be true.

Step-by-Step Solution:
The statement is: "A quadrilateral is a parallelogram if and only if its diagonals bisect each other."
Break it into two parts:
If a quadrilateral is a parallelogram, then its diagonals bisect each other. (True)
If a quadrilateral has di...