2 citations · 3 across the 4 of their papers we have counts for
4 papers
Standardised co-ordinate geometry applied to affine rational trigonometry of a tetrahedron
Gennady Arshad Notowidigdo
The idea of standardised co-ordinates in three-dimensional affine space is defined, by way of the Standard tetrahedron. By performing an affine map on a general tetrahedron, we may…
Generalised vector products and metrical trigonometry of a tetrahedron
Gennady A Notowidigdo, Norman J Wildberger
We study the general rational trigonometry of a tetrahedron, based on quadrances, spreads and solid spreads, using vector products associated to an arbitrary symmetric bilinear for…
A rational trigonometric relationship between the dihedral angles of a tetrahedron and its circumradius
Gennady Arshad Notowidigdo
This paper will extend a known relationship between the circumradius and dihedral angles of a tetrahedron in three-dimensional Euclidean space to three-dimensional affine space ove…
Generalised vector products in three-dimensional geometry
Gennady A Notowidigdo, Norman J Wildberger
In three-dimensional Euclidean geometry, the scalar product produces a number associated to two vectors, while the vector product computes a vector perpendicular to them. These are…