Assertion: icosahedron's face | /r/HasProperty | isosceles triangle
Facets:
Source sentences:
text: 60 Faces (isosceles triangle)
text: Its faces are isosceles triangles with one obtuse angle of arccos ⁡ ( − 3 ϕ / 10 )
text: The Cubiakis Icosahedron can be constructed by grafting twenty triangular pyramids onto an icosahedron where each face is an isosceles triangle with angles of 45-45-90 degrees.