Linked from

The 15 pages that link to Rectangle, each with the reason it gives.

• Aspect ratioRelated: An image frame’s aspect ratio compares the sides of its rectangular boundary.

• Cyclic quadrilateralBroader topic: Every rectangle is cyclic because each pair of opposite angles sums to 180 degrees.

• PerimeterBroader topic: Its perimeter equals twice the sum of its length and width.

• SquareCompared with: Every square is a rectangle, but a rectangle need not have four equal sides.

• QuadrilateralCompared with: Every rectangle is a parallelogram, but not every rectangle has four equal sides.

• ParallelogramBroader topic: It is a parallelogram whose adjacent sides meet at right angles.

• Right angleBroader topic: Every corner of a rectangle is a right angle.

• Flag ratioRelated: Most flags are rectangular, so their width and height define their outline.

• NeoplasticismBroader topic: Rectangular color fields provide the bounded planes in Neoplasticist paintings.

• AcreRelated: An acre can be laid out as a rectangle, but no particular dimensions define it.

• Van Aubel's theoremBroader topic: A rectangle provides a familiar special case where the opposite-square center segments can be checked directly.

• Euler's quadrilateral theoremBroader topic: Its diagonals bisect one another, so the midpoint correction vanishes.

• British flag theoremNarrower topic: The theorem depends on the rectangle’s perpendicular sides and opposite-vertex pairs.

• Constant chord theoremBroader topic: A rectangle inscribed in a circle has equal diagonals because they subtend equal right angles.

• Japanese theoremBroader topic: Its equal opposite sides and symmetric diagonals make the paired triangles easy to compare.