Assertion: dodecahedron's triangle | /r/HasAspect | its hypotenuse
Facets:
Source sentences:
text: The one element [that is, the triangle which has its hypotenuse twice the lesser side], having generated these figures, generated no more, but the isosceles triangle produced the fourth elementary figure, which is compounded of four such triangles, joining their right angles in a center, and forming one equilateral quadrangle.