Final answer:
The statement is a Biconditional statement, indicating that the two conditions of being a right angle and having a 90-degree measure are logically equivalent and reliant on each other.
Step-by-step explanation:
The statement "An angle is a right angle if and only if its measure is 90 degrees" is an example of a Biconditional statement. A biconditional statement is true when both parts are true or both are false; it conveys that the two statements are logically equivalent, meaning the conditions specified are both necessary and sufficient for each other. In this context, both conditions are that the angle is a right angle and that its measure is 90 degrees. If the angle is a right angle, its measure must be 90 degrees, and if an angle measures 90 degrees, it must be a right angle.