Assertion: octahedron's triangle | /r/HasProperty | isoscele
Facets:
Source sentences:
text: The other six triangles are isosceles.
text: The other six triangles are isosceles.
text: The other six triangles are isosceles.
text: The other six triangles are isosceles.
text: Topologically, the squares corresponding to the octahedron's vertices are always regular, although the hexagons, while having equal edge lengths, do not have the same edge lengths with the squares, having different but alternating angles, causing the triangles to be isosceles instead.
text: We have previously shown that the triangles OEN and OGN are isosceles and congruent (the vertices may have different names, but the triangles are the same!)