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OpenStudy (anonymous):
FREE MEDAL TO THE SMARTEST ONE Which biconditional is NOT a good definition? A. A whole number is even if and only if it is divisible by 2. B. A whole number is odd if and only if the number is not divisible by 2. C. An angle is straight if and only if its measure is 180. D. A ray is a bisector of an angle if and only if it splits the angle into two angles.
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