WhakamĀrama Āpitihanga
E whakamahia ana te papanui hei ine i te horahanga o te tēpu. He waeine arokē te papanui:
E 6cm2 te horahanga o ngā tapawhā hāngai nei:
Hei tātai i te horahanga o tētahi tapawhā hāngai, me whakarea te whānui ki te roa. Koia nei te ture hei reo tohu: H = wh × r (Horahanga = whānui x roa)
Hei tātai i te horahanga o tētahi tapatoru, me whakarea te pūtake ki te teitei, ka whakahaurua ai.
Koia nei te ture: H = 1/2 × p × t (Horahanga = 1/2 × pūtake × teitei)
Ko te horahanga mata, koirā te horahanga o ngā mata katoa o tētahi āhua ahu-3. Hei tauira: E 6 ngā mata o te mataono rite nei, e 4cm2 te horahanga o ia mata. Nō reira, e 24cm2 tōna horahanga mata:
