I totonu o lenei lomiga, o le a tatou mafaufau pe faʻapefea ona faʻatusatusa le pito i luga o se rectangular parallelepiped ma iloilo se faʻataʻitaʻiga o le foia o se faʻafitauli mo le faʻapipiʻiina o se mea.
lotomalie
Fua fa'atatau
O le vaega (S) o le pito i luga o se kuboid ua fuafuaina e faapea:
S = 2 (ab + bc + ac)
E maua le fua fa'apea:
- O foliga o se fa'ata'ifa'afa'afa'afa'afa'afa'afa'afa'afa'afa'afa'afa'afafa'atau, ma o foliga fa'afeagai e tutusa le tasi ma le isi:
- lua fa'avae: fa'atasi ma itu a и b;
- fa mata itū: ma le itu a/b ma umi c.
- Faʻaopoopoina vaega o foliga uma, o ia mea taʻitasi e tutusa ma le fua o itu o le umi eseese, tatou te maua: S = ab + ab + bc + bc + ac + ac = 2 (ab + bc + ac).
Faataitaiga o se faafitauli
Fa'atatau le vaega pito i luga ole pa'u pe afai e iloa o lona umi e 6 cm, lautele e 4 cm, ma le maualuga e 7 cm.
Filifiliga:
Sei o tatou faʻaogaina le fua faʻatatau o loʻo i luga, suitulaga i totonu o mea taua:
S = 2 ⋅ (6 cm ⋅ 4 cm + 6 cm ⋅ 7 cm + 4 cm ⋅ 7 cm) = 188 cm2.