pānga tahi
1. (noun) one-on-one relationship (maths).
Ko te 'haurua' te pānga e whakaaturia ana i konei. He pānga tahi tēnei. Arā, kōtahi anake te pānga o tētahi huānga ki tētahi (TRP 2010:193) / A half is the relationship shown here. This is a one-on-one relationship. That is, there is only one relationship of one element to another.