Assertion: icosahedron's dodecahedron | /r/HasProperty | 12 triangles
Facets:
Source sentences:
text: The ancient Greeks figured out that there were just a few solid objects that could be constructed from certain flat, regular polygons (equilateral triangle, square, or pentagon): tetrahedron (4 triangles), cube (6 squares), octahedron (8 triangles), dodecahedron (12 triangles or 12 pentagons), and icosahedron (20 triangles).