Now that which is indivisible in quantity is called a unit if it is not divisible in any dimension and is without position, a point if it is not divisible in any dimension and has position, a line if it is divisible in one dimension, a plane if in two, a body if divisible in quantity in all-- i.e.
Horrela, bada, kantitatearen arabera 25) zatiezina denari "monada" esaten zaio erabatekoa eta posiziorik gabea baldin bada, "puntua" erabatekoa eta posizioduna baldin bada; "lerroa" dimentsio bakarrez zatigarria baldin bada, "azalera" bi dimentsioz baldin bada zatigarria eta "gorputza" kantitatearen arabera erabat eta hiru dimentsioz zatigarria dena.