Biconditional means that the first statement is true "if an only if" the second statement is true.
Which alternative fits that definition?
which statement is biconditional
a)if x=5, then 2x+3=13
b)if two angles are a linear pair, then they = 180 degrees
c) if the car runs out of gas, then it will stop
d) if a figure is square, then it has four sides
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