Gonyoina tsazamativi rega-rega rine maguramakonyo mbiri anobatanidza mikwava (vertices) miviri yakatarisana, uye mativi maviri akati sambamba. Kuchishandiswa gonyonhatu dzine chidzudzani pane umbowo hwokuti gonyoina tsazamativi rine kupimirana kunotevedza madanhamakonyo maviri ari mariri. Chiumbwa ichi chine faniro (properties) dzinotevera: