IPA: /æŋˈɡjʊleɪʃən/
KK: /æŋɡjʊˈleɪʃən/
The state or condition of being angled or having angles; the way in which angles are formed or arranged.
The angulation of the roof allows for better drainage of rainwater.
Angulation is formed from "angulus" (meaning corner or angle) and "-ation" (a suffix used to form nouns indicating an action or process). The word refers to the process or state of forming angles or corners.
Think of 'angles' ('angulus') being formed in a process ('-ation') — that's what angulation means.