Forum Geometricorum
Volume 18 (2018)

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18. Gábor Gévay, An extension of Miquel's six-circles theorem, 115--118.
17. Sándor Nagydobai Kiss, On the cyclic quadrilaterals with the same Varignon parallelogram, 103--113.
16. Hiroshi Okumura and Saburou Saitoh, Remarks for the twin circles of Archimedes in a skewed arbelos, 99--102.
15. Gerasimos T. Soldatos, A toroidal approach to the doubling of the cube, 93--97.
14. Paris Pamfilos, Parabola conjugate to rectangular hyperbola, 87--92.
13. Robert Bosch, A new proof of Erdős-Mordell inequality, 83--86.
12. Francisco Javier García Capitán, A family of triangles for which two specific triangle centers have the same coordinates, 79--82.
11. Li Zhou, Primitive Heronian triangles with integer inradius and exradii, 71--77.
10. Apostolos Hadjidimos, Twins of Hofstadter elements, 63--70.
9. Michel Bataille, On the extrema of some distance ratios, 57--62.
8. Giovanni Lucca, Integer sequences and circle chains inside a circular segment, 47--55.
7. Lubomir P. Markov, Revisiting the infinite surface area of Gabriel's horn, 45--46.
6. Hiroshi Okumura, A remark on the arbelos and the regular star polygon, 43--44.
5. Manfred Pietsch, Two hinged regular $n$-sided polygons, 39--42.
4. Samuel G. Moreno and Esther M. García--Caballero, Irrationality of √2: Yet another visual proof, 37--38.
3. C. E. Garza-Hume, Maricarmen C. Jorge, and Arturo Olvera, Areas and shapes of planar irregular polygons, 17--36.
2. Carl Eberhart, Revisiting the quadrisection problem of Jacob Bernoulli, 7--16.
1. Stefan Liebscher and Dierck-E. Liebscher, The relativity of conics and circles, 1--6.