On his math test, balavan wrote that a four-sided polygon that has at least two right angles must be a rectangle or a square. denna wrote that a four-sided polygon needs at least three right angles to be a rectangle or a square. who is right? explain your answer.

Denna is correct. The sum of the angles in a quadrilateral is 360°, so if 3 of the angles are 90°, the fourth must also be 90°, creating a rectangle or a square. A quadrilateral can be drawn with the angles 90°, 90°, 120°, and 60°, but it is not a rectangle. Balavan is incorrect.

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