Ko te āhua o te mata ina tapahia tētahi koeko, kāore te tapahanga e whakarara ki te rōnaki o te koeko. Koia hoki te āhua o tētahi momo kauwhata motuhake.
The shape of the face produced when a cone is cut so as not to be parallel with the slope of the cone. It is also the shape of a special type of graph.
He pūwerewere te āhua o tēnei kauwhata. E kore e haukoti i te tuaka-y, i te tuaka-x rānei, engari ka pātata haere, ka pātata haere. Ka kīia ngā tuaka ko ngā tepe whakatata o te pūwerewere. Ko te whārite o tēnei pūwerewere ko te xy = 1: