KnowraDiagonalLinked fromLinked fromThe 8 pages that link to Diagonal, each with the reason it gives.All 8Broader topic 2Related 6Cyclic quadrilateralRelated: The quadrilateral's diagonals appear in Ptolemy's theorem and divide it into triangles.Ptolemy's inequalityRelated: The two diagonals form the left-hand product in the inequality.Euler's quadrilateral theoremRelated: The theorem compares the squared lengths of both diagonals with the four squared sides.Square root of 2Related: The diagonal of a unit square has length square root of 2.Word searchRelated: Diagonal placement expands the directions in which a word may appear.Japanese theoremRelated: The two diagonals divide the cyclic quadrilateral into the four triangles compared.