Question

"A quadrilateral is a square if and only if it has fourright angles."Which of the following terms provides acounterexample for why the biconditional statement is

Answer 1

Given statement: A quadrilateral is a square if and only if it has four right angles

Counterexample: A quadrilateral with four right angles can be also a rectangle. Then, not all quadrilaterals with four right angles are squares.

Answer: Rectangle