Assertion: tetrahedron's angle | /r/HasProperty | equal
Facets:
value: to arcsin{sqrt{3
type: OTHER
Source sentences:
text: I think that the dihedral angle is ,in fact, equal to arcsin{sqrt{3} / 3} , and arctan{sqrt{6} / 2}
text: Since all angles are equal cos(pi/3)=cos(pi/3)^2+sin(pi/3)^2*cos(a)
text: The solid angle of a face subtended from the center of a platonic solid is equal to the solid angle of a full sphere (4π steradians) divided by the number of faces.
text: The regular dodecahedron represents a special intermediate case where all edges and angles are equal.
text: Continuing from there in that direction, we pass through a degenerate case where twelve vertices coincide in the centre, and on to the regular great stellated dodecahedron where all edges and angles are equal again, and the faces have been distorted into regular pentagrams.
text: All the dihedral angles of the polyhedron are equal