Assertion: decagon's angle | /r/HasProperty | α<180°(1-2/n
Facets:
Source sentences:
text: Branko Grünbaum in Tilings and Patterns represents these stars as |n/d| that match the geometry of polygram {n/d} with a notation {n α } more generally, representing an n-sided star with each internal angle α<180°(1-2/n) degrees.