Assertion: octagon's side | /r/HasProperty | same length
Facets:
Source sentences:
text: If the sides are all the same length, and the angles are all equal, it is a regular octagon.
text: A regular octagon is always an octagon whose sides are all the same length and whose internal angles are all the same size.
text: An octagon can be regular if all the sides are the same length, and all the angles are the same.
text: An octagon is a shape with eight sides that are all the same length.