EntityQ2264221· pop 16· linked from 16 articlesinscribed square problemSign in to saveunsolved problem in geometry of whether every simple closed curve in the plane contains four points at the corners of a squareConnectionspiecewise functionEntityacute or obtuse triangleEntityInscribed figureEntitygeometryEntityInternational Standard Book NumberEntitycircleEntitysquareEntityrectangleEntitypolygonEntitymathematical proofEntityradiusEntityrhombusEntitydigital object identifierEntityInternational Standard Serial NumberEntitytrapezoidEntitylimitEntityfractalEntityright triangleEntitycurveEntityequilateral triangleEntityCategoriesCurvesUnsolved problems in geometry