Mathematics, 21.05.2020 13:59 zel990252

Which of the following is a biconditional statement?
A) A shape has four sides if and only if it's a quadrilateral.
B) If a shape is a quadrilateral, then it has four sides.
C) If a shape doesn't have four sides, then it isn't a quadrilateral.
D) if a shape has four sides, then it's a quadrilateral.

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Which of the following is a biconditional statement?
A) A shape has four sides if and only if...