EntityQ23719451· pop 7· linked from 5 articlesgoat problemSign in to savemathematical problemConnectionsdigital object identifierEntityInternational Standard Serial NumberEntitycurveEntitycomplex analysisEntitydiskEntityJSTOREntityisosceles triangleEntitycircular sectorEntityMonty Hall problemEntityOn-Line Encyclopedia of Integer SequencesEntityiterationEntitycircular segmentEntityMathWorldEntityQ22908627Entityline integralEntityinvoluteEntitycentral angleEntitytranscendental functionEntityrecreational mathematicsEntityspherical capEntityCategoriesAreaCirclesMetaphors referring to sheep or goatsRecreational mathematics