Assertion: octagon's angle | /r/CapableOf | add to 1080 degrees
Facets:
value: always
type: TEMPORAL
Source sentences:
text: An octagon is a polygon with 8 sides and 8 interior angles which add to 1080 degrees.
text: You'll come across the word most often in geometry class, where you'll also learn that an octagon's eight interior angles always add up to 1080 degrees.