An octagon is a polygon with eight sides. Which of the following this definition as a biconditional statement?
O If a polygon has eight sides, then it is an octagon
O A polygon is an octagon if and only if it has eight sides.
If a polygon is an octagon, then it has eight sides.

The second answer option:

"A polygon is an octagon if and only if it has eight sides."

Step-by-step explanation:

A biconditional statement needs to have a conditional statement and also its reverse. This is in general happening in a case of a statement with the "If-and-only-if" form.

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