Journal for Geometry and Graphics

Volume 24 (2020)

  Number 1Number 2 

Number 1

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N. Anghel
A Generalization of Pascal's Hexagon Theorem to Real Hilbert Spaces
1--7 [Abstract / Full Text]

D. Hu
Constructions in the Locus of Isogonal Conjugates for a Quadrilateral
9--28 [Abstract / Full Text]

H. Katsuura
Solid Angle Sum of a Tetrahedron
29--34 [Abstract / Full Text]

C. Kimberling, P. J. C. Moses
Mappings from the Plane of a Triangle to a Circumconic
35--47 [Abstract / Full Text]

K. Myrianthis
Entangled: From Triangles to Polygons
49--64 [Abstract / Full Text]

N. P. Nguyen
A Generalization of Desargues' Involution Theorem
65--72 [Abstract / Full Text]

V. Oxman, A. Sigler
Relations Between Ceva's Theorem and the Concurrency of Midlines of Quadrilaterals in a Triangle
73--77 [Abstract / Full Text]

D. S. Reznik, R. Garcia, J. Koiller
The Ballet of Triangle Centers on the Elliptic Billiard
79--101 [Abstract / Full Text]

K. Máthé, J. Szirmai
Optimal Cells in Crystallography and Arts
103--124 [Abstract / Full Text]

D. P. Kelly
Three-Dimensional Modeling Self-Efficacy: An Examination of Psychometric Properties of a Domain-Specific Instrument in Engineering Graphics Education
125--140 [Abstract / Full Text]

Number 2

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H. Stachel
Recalling Thread Constructions of Quadrics
143--157 [Abstract / Full Text]

M. Ternullo
The Ellipse, Monge’s Circle and Other Circles
159--173 [Abstract / Full Text]

N. Le, N. J. Wildberger
The Pentagrammum Mysticum, Twelve Special Conics and the Twisted Icosahedron
175--191 [Abstract / Full Text]

A. Bailey, H. Katsuura
Geometric Inequalities on Parallelepipeds and Tetrahedra
193--196 [Abstract / Full Text]

N. Dergiades, T. Q. Hung
On some Extensions of Morley’s Trisector Theorem
197--205 [Abstract / Full Text]

G. A. Notowidigdo
A Rational Trigonometric Relationship Between the Dihedral Angles of a Tetrahedron and its Circumradius
207--216 [Abstract / Full Text]

Suren, P. J. C. Moses, C. Kimberling
The Circumcevian-Inversion Perspector of Two Triangles
217--232 [Abstract / Full Text]

C. Kimberling, P. J. C. Moses
Permutation Ellipses
233--247 [Abstract / Full Text]

M. N. I. Khan, L. S. Das
On CR-Structures and the General Quadratic Structure
249--255 [Abstract / Full Text]

S. Ouarab, A. O. Chahdi, M. Izid
Ruled Surface Generated by a Curve Lying on a Regular Surface and its Characterizations
257--267 [Abstract / Full Text]