KnowraRectangleLinked fromLinked fromThe 15 pages that link to Rectangle, each with the reason it gives.All 15Broader topic 9Related 3Narrower topic 1Compared with 2Cyclic 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.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.NeoplasticismBroader topic: Rectangular color fields provide the bounded planes in Neoplasticist paintings.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.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.