Assertion: polygon's angle | /r/CapableOf | add up to 360 degrees
Facets:
Source sentences:
text: An alternative approach defines isosceles triangles based on shared properties, i.e. ^ n external angles of any n-sided Theexternal angles of any-sided convex polygon add up to 360 degrees. ^
text: The angles of those triangles at the centre of the polygon add to 360 degrees, and there are 20 of them.
text: A square has 4 angles which add up to 360 degrees.