EntityQ3142443· pop 7· linked from 4 articlesVan Hiele modelSign in to saveTheory of how students learn geometryConnectionsnon-Euclidean geometryEntityNetherlandsConceptgeometryEntitytriangleEntitycircleEntitysquareEntityrectangleEntityaxiomEntitymathematical proofEntitydigital object identifierEntityJean PiagetEntitytheoremEntityEuclidean geometryEntityequilateral triangleEntityinductive reasoningEntityJSTOROrganizationdeductive reasoningEntityisosceles triangleEntityUtrecht UniversityEntitynecessity and sufficiencyEntityCategoriesGeometry educationPedagogy