a figure has 10 sides if and only if it is a decagon?

Question

bioconditional statment

Answer 1

Are you asking if this is a true statement?

To find out, you must ask yourself if BOTH the following are true:

1) If a figure has 10 sides then it is a decagon.

2) If a figure is a decagon then it has 10 sides

A true biconditional statement means it is true both directions (forwards and backwards).