EntityQ7092338· pop 6· linked from 8 articlesOne-seventh area triangleSign in to saveGeometric construction of a smaller triangleConnectionstriangleEntityareaEntityRichard FeynmanEntityEuclidean geometryEntityInternet ArchiveEntityJames RandiEntityMartin GardnerEntityHugo SteinhausEntityWileyEntityHarold Scott MacDonald CoxeterEntitycevianEntityRouth's theoremEntityMarion WalterEntityThe Mathematical GazetteEntityCategoriesAffine geometryAreaObjects defined for a triangle