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Determine whether the conditional and its converse are both true. If both are true, combine them as a biconditional. If either is false, give a counterexample.
If an angle is a right angle, its measure is 90.
If an angle measure is 90, the angle is a right angle.

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nobillionaireNobley
The conditional and its converse are true, and the biconditional is
An angle is a right angle if and only if its measure is 90.

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