Assertion: octagon's vertex | /r/HasProperty | adjacent
Facets:
Source sentences:
text: Notice that triangles NEVER have diagonals: if we start from any vertex in a triangle, the other two vertices are adjacent.
text: Starting from one vertex, two other vertices are adjacent, so 3 vertices are non-adjacent, making possible three diagonals from one vertex.
text: Starting from one vertex, two other vertices are adjacent, so 3 vertices are non-adjacent, making possible three diagonals from one vertex.
text: Starting from one vertex, two other vertices are adjacent, so five vertices are non-adjacent, making possible five diagonals from one vertex.
text: Starting from one vertex, two other vertices are adjacent, so five vertices are non-adjacent, making possible five diagonals from one vertex.