Assertion: octahedron's triangle | /r/CapableOf | show the top four faces a
Facets:
Source sentences:
text: Label the four triangles showing the top four faces A, B, C, D ; then label the outer triangles E, F, G, H, so that E is alongside A, F is alongside B, and so on ; let us denote this colour scheme (A B C D)|(E F G H).