Mathematics, 30.01.2020 11:00 gungamer720

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 off if and only if the number is divisible by 2
c.) a ray is a bisector of an angle if and only if it splits the angle into two angles
d.) an angle is straight if and only if it's measure is 180

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Which biconditional is not a good definition ?

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