Which property is true for rectangles?

For rectangles, the property that holds true is that opposite sides are equal and parallel. This means that in a rectangle, the lengths of the two pairs of opposite sides are equal, making them parallel as well. This is a defining characteristic of rectangles, which are a specific type of quadrilateral.

In the context of geometry, a rectangle has four right angles (90 degrees), which confirms that the sides opposite each other are equal and not necessarily acute. Additionally, while rectangles do have diagonals, those diagonals are not perpendicular; they are equal in length but do not intersect at right angles. Lastly, rectangles do not require all sides to be of equal length (which is a property of squares), allowing for the correct identification of opposite sides being equal and parallel as the essential property of rectangles.