Which of the following is a property of a square that is also true for a rectangle?

• A. Opposite sides are parallel
• B. All sides are equal
• C. Diagonals bisect each other
• D. All angles are 90 degrees

Answer: (A)

Think about what a square and a rectangle have in common. Both are four-sided figures where opposite sides go in the same direction, so the top and bottom edges are parallel and the left and right edges are parallel. This parallelism is a fundamental feature of these shapes and doesn’t depend on the exact lengths of the sides, so it holds for both a square and a rectangle.

Other options touch on true properties, but they’re not shared in the same universal way: a square has all sides equal, which a rectangle does not; diagonals bisect each other is also true for both since both are parallelograms, and all angles being 90 degrees is true for rectangles (and therefore squares) as well. The clearest common property to pick is the opposite sides being parallel.