Mathematics, 29.01.2020 03:04 bxymichelle

Which biconditional is not a good definition?

three points are collinear if and only if they lie on the same line.

two line segments are congruent if and only if they have same length.

a whole number is even if and only if it is divisible by 2.

two lines are parallel if and only if they do not intersect.

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Which biconditional is not a good definition?

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