EntityQ1321926· pop 20· linked from 109 articlesconstructible numberSign in to savereal number that can be geometrically constructed with compass and straightedge from a unit segment in a finite number of stepsConnectionsintegerEntitysquare rootEntitycompass and straightedge constructionEntityfield extensionEntitysine and cosineEntityeuclidean fieldEntitydefinable real numberEntityPlatoEntityRené DescartesEntityArchimedesEntitynumberEntitygeometryEntityCarl Friedrich GaussEntityalgebraEntityAncient GreeceEntityInternational Standard Book NumberEntitynatural numberEntityPlutarchEntitycomplex numberEntityinfinityEntityCategoriesAlgebraic numbersEuclidean plane geometry