Assertion: dodecahedron's face | /r/HasProperty | acute isosceles triangles
Facets:
value: with one angle of arccos ⁡
type: OTHER
Source sentences:
text: The faces are acute isosceles triangles.
text: Its faces are acute isosceles triangles with one angle of arccos ⁡ ( ( − 8 + 9 ϕ ) / 18 )