Ableɣ d amsektay asangam i wakat n taɣult i d-ttaṭṭaf kra n tfekka deg kra n wadeg, Ableɣ yemgarad ɣef wenrar, acku anrar iga d asmektay n tɣult tasenseggawt (2D), ma d ableɣ iga d asmektay n tɣult takerseggawt. Amedya, I wsiden n ubleɣ n ugasas ad nekfed anrar n yiwen seg wudmawen-is ɣef tiddi. Ableɣ ur yeqqin ara ɣer tkura neɣ ɣer wazuk maca iga d taskant seg teskanin n tenga tisimanin acku iga d tajumma kan ɣef wacu i d-teẓẓun tfekka, dɣa ma tella tneẓẓi-ines teflal ad yili tkura-ines meqqer ɣas ma yella ubleɣ-is meẓẓiy. s wanecta tineẓẓi d ubleɣ zemren ad gucclen takuramaca ur ila ara (ur yesɛi ara) atig iman-is deg usiden n tkura,ma d azuk iga kan d tadusi n welday (ajbad) i ṭṭafarent tfekkiwin anda ig mgarad seg wadeg ɣer wayeṭ, amedya: tifekkiwin deg Yebter ẓẓay-it ɣef tfekkiwin deg tegnit acku dinna yulek i tdusi n welday meqqren. Azamul n ubleɣ d V, yettwakat s tiggtin tusligin, amedya: m³ neɣ cm³ neɣ mm³. Ableɣ n ugasas yettwakat s 3 n iseggiwen idiganen: Teɣzi, Tehri d Tiddi. Ableɣ yettusemres deg tenfalit n tɣawsiwin timdettiyin am wesfer d tmuskiwin ... Atg, acku tiɣawsiwin-a yakk lant teɣzi d tehri d tiddi. Ableɣ n ugasas = teɣzi × tehri × tiddi^3 Ableɣ n umsadaɣ n iserman = teɣzi × tehri × tiddi Ableɣ n uzamug = (tajumma n uzadur × 3) × tiddi Akat n yibleɣen n tfekkiwin Ẓeṛ daɣen Anagraw agraɣlan n tiynin (SI) Tigget n usekti Litra