BICONDITIONAL STATEMENTS
When conditional statement and its converse are both true, you can write them as a single biconditional statement. A biconditional statement is a statement that contains the phrase "if and only if."
NOTE; Any vaild definition can be written as a biconditional statement.
Example 4:
Write a biconditional
Write the definition of parallel lines as a biconditional.
Definition: If two lines lie in the same plane and do not intersect, then they are parallel.
Solution
