He tātaitai tenei e tatau ana i te rōrahi o te pūtoru, ine tautoko me te wae imperial (inihi, waewae, iari, mm, cm, mita ranei), ka huri te hua rōrahi ki te waeine rerekē, me te tātai tātai me te mataono hihiko. ka awhina i a maatau ki te tiki whakautu me te maarama ngawari ki nga hua.
Ko te Cuboid he pouaka totoka ko ia mata he tapawha o te horahanga kotahi, he waahi rereke ranei.
Ka whai te roa, te whanui me te teitei o te tapatoru.
Rōrahi o te pūtoru = (roa × whānui × teitei) wae pūtoru.
Kimihia te rōrahi o te pūtoru o te rahi 14 cm × 12 cm × 8 cm.
Ki te hiahia tatou ki te huri i nga waeine o te rōrahi ki ngā waeine rerekē, ka taea e tatou te huri i ngā waeine o te rahi ki te ōrite o te rōrahi i te tuatahi,
hei tauira,
he 12.5 inihi te rahi o te mataono, 14 inihi me te 9.3 inihi.
He aha te rōrahi i roto i te ft³?
Apūtoruhe mea ahua pouaka. E ono ona mata papatahi, he koki tika nga koki katoa. A ko ona mata katoa he tapawha. He parama hoki na te mea he rite tonu te whitinga o te roa. Inaa, he tapawha tapawha.
Ina rite nga roa e toru ka kiia ko aporaka(hexahedron ranei) a he tapawha ia mata. He tapatapahi tonu te mataono, he mataono ano hoki.