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Biconditionals and Definitions A Biconditional is a single true statement that combines a true conditional and its true converse. • If p, then q and if q then p are combined A right angle is an angle whose measure is 90. • Write the conditional part of the definition in the direction term to characteristic. • Write the conditional in the direction characteristic to term • Write the definition as a biconditional. Good definition 1. Only words either commonly understood, defined earlier, or purposely undefined. 2. Accurately describe the idea being defined 3. Include no more information than is necessary. Which of the following is a good definition? • An angle is a line with a bend. • A fish is an animal that swims • A penny is a coin worth one cent p. 101, #7-29 odd