Random triples
| Subject | Object |
|---|---|
| gptkb:Parabolas | x = -b/(2a) |
| gptkb:Ellipsoid_of_revolution | minor axis |
| gptkb:rotational_ellipsoid | principal axis of ellipse |
| gptkb:Ellipsoid_of_revolution | major axis |
| gptkb:Maclaurin_spheroid | rotation axis |
| gptkb:Parabola | vertical line through vertex |