EntityQ15904307· pop 5· linked from 6 articlesMoser's worm problemSign in to saveUnsolved geometry problem about planar regionsConnectionsgeometryEntityareaEntitycircleEntityrhombusEntitydigital object identifierEntityJSTOREntityQ118398EntitycongruenceEntitycircular sectorEntityconvex setEntityQ22908627Entitylist of unsolved problems in mathematicsEntitypolygonal chainEntityplane curveEntityMathematical ReviewsEntitymoving sofa problemEntityAmerican Mathematical MonthlyEntityLeo MoserEntityKakeya setEntityLebesgue's universal covering problemEntityCategoriesAreaCurvesDiscrete geometryRecreational mathematicsUnsolved problems in geometry