Question

Which biconditional is a good definition?

A.) Two angles are adjacent if and only if they share a common side.

B.) A point is the midpoint of a segment if and only if it is between the endpoints of the segment.

C.) Two angles are supplementary if and only if they form a linear pair.

D.) Two lines are parallel if and only if they never intersect.

Answer 1

A bio-conditional is basically means "A if and only if B"

Now which one of the statements match the example?