EntityQ4971339· pop 12· linked from 5 articlesBritish flag theoremSign in to saveon distances from opposite corners to a point inside a rectangleConnectionsUnited KingdomCountryareaEntityInternational Standard Book NumberEntitysquareEntityPythagorean theoremEntityequationEntityrectangleEntityWayback MachineEntitydigital object identifierEntityparallelogramEntitytheoremEntityElementsEntityEuclidean geometryEntityright triangleEntityline segmentEntityflag of the United KingdomEntityEuclidean spaceEntitysquareEntityperpendicularityEntityJacques HadamardEntityCategoriesEuclidean geometryPythagorean theoremTheorems about quadrilaterals