Sadek, Jawad
(with M. Bani-Yaghoub and N. H. Rhee) Isogonal conjugates in a tetrahedron, 16
(2016) 43--50.
Isogonal conjugates in an n-simplex, 17 (2017) 425--432.
Saitoh, Saburou
(with H. Okumura) Remarks for the twin circles of Archimedes in a skewed arbelos, 18 (2018) 99--102.
Salazar, Juan Carlos
(with N. Dergiades) Harcourt's theorem, 3 (2003) 117--124.
On the areas of the intouch and extouch triangles, 4 (2004) 61--65.
(with K. L. Nguyen) On the mixtilinear incircles and excircles, 6 (2006) 1--16.
(with N. Dergiades) Some triangle centers associated with the tritangent circles, 9 (2009) 259--270.
Sandor, Jozsef
On the geometry of equilateral triangles, 5 (2005) 107--117.
(with R. Olah-Gal) On trigonometric proofs of the Steiner-Lehmus theorem, 9 (2009) 155--160.
Sastry, K. R. S.
Heron triangles: a Gergonne-cevian-and-median perspective, 1 (2001) 17--24.
Brahmagupta quadrilaterals, 2 (2002) 167--173.
Triangles with special isotomic conjugate pairs, 4 (2004) 73--80.
Construction of Brahmagupta n-gons, 5 (2005) 119--126.
A Gergonne analogue of the Steiner-Lehmus theorem, 5 (2005) 191--195.
Two Brahmagupta problems, 6 (2006) 301--310.
Sato, Kenzi
Orthocenters of simplices on spheres, 17 (2017) 301--324.
Orthocenters of simplices in hyperbolic spaces, 17 (2017) 483--508.
Scheer, Michael J. G.
A simple vector proof of Feuerbach's theorem, 11 (2011) 205--210.
Schmidt, Eckart
Circumcenters of residual triangles, 3 (2003) 207--214.
Schreck, Pascal
Wernick's list: a final update, 3 (2016) 69--80.
Schröder, Eberhard M.
(with J. C. Fisher and J. Stevens) Circle incidence theorems, 15 (2015) 211--228.
Scimemi, Benedetto
Paper-folding and Euler's theorem revisited, 2 (2002) 93--104.
Simple relations regarding the Steiner inellipse of a triangle, 10 (2010) 55--77.
Semi-similar complete quadrangles, 14 (2014) 87--106.
Searby, David Graham
On three circles, 9 (2009) 181--193.
Semiao, Paulo
(with J. Rodriguez and P. Manuel) A conic associated with the Euler line, 6 (2006) 17--23.
ShahAli, Hassan Ali
(with S. Abu-Saymeh and M. Hajja) Another variation of the Steiner-Lehmus theme, 8 (2008) 131--140.
Shattuck, Mark
(with T. Mansour) On a certain cubic geometric inequality, 11 (2011) 175--181.
(with T. Mansour) Improving upon a geometric inequality of third order, 12 (2012) 227--235.
Steiner-Lehmus type results related to the Gergonne point of a triangle, 17 (2017) 49--62.
(with T. Mansour) Some monotonicity results related to the Fermat point of a triangle, 16 (2016) 355--366.
Shawyer, Bruce
Some remarkable concurrences, 1 (2001) 69--74.
Sigur, Steve
Where are the conjugates? 5 (2005) 1--15.
Singer, David A.
(with J. C. Langer) The lemniscatic chessboard, 11 (2011) 183--199.
Singhal, Navneel
On the orthogonality of a median and a symmedian, 17 (2017) 203--206.
Smith, Geoffrey C.
Statics and the moduli space of triangles, 5 (2005) 181--190.
(with C. Bradley) The locations of triangle centers, 6 (2006) 57--70.
(with C. Bradley) The locations of the Brocard points, 6 (2006) 71--77.
(with C. Bradley and D. Monk) On a porism associated with the Euler and Droz-Farny lines, 7 (2007) 11--17.
(with C. Bradley) On a construction of Hagge, 7 (2007) 231--247.
Soldatos, Gerssimos T.
A toroidal approach to the Archimedean quadrature, 17 (2017) 13--15.
A toroidal approach to the doubling of the cube, 18 (2018) 93--97.
Spirova, Margarita
(with M. Hajja) A characterization of the centroid using June Lester's shape function, 6 (2006) 53--55.
Stern, Joseph
Euler's triangle determination problem, 7 (2007) 1--9.
Stevanovic, Marina M.
(with P. B. Petrovic and M. R. Stevanovic) Radii of circles in Apollonius' problem, 17 (2017) 359--372.
Stevanovic, Milorad R.
Triangle centers associated with the Malfatti circles, 3 (2003) 83--93.
The Apollonius circle and related triangle centers, 3 (2003) 187--195.
Two triangle centers associated with the excircles, 3 (2003) 197--203.
(with P. B. Petrovic and M. M. Stevanovic) Radii of circles in Apollonius' problem, 17 (2017) 359--372.
Stevens, Jan
(with J. C. Fisher and E. M. Schröder) Circle incidence theorems, 15 (2015) 211--228.
Stothers, Wilson
Grassmann cubics and desmic structures, 6 (2006) 117--138.
Stroe, Marian
(with D. Marinescu, M. Monea and M. Opincariu) A sequence of triangles and geometric inequalities, 9 (2009) 291--295.
Stupel, Moshe
(with V. Oxman) Why are the side lengths of the squares inscribed in a triangle so close to each other?, 13 (2013) 113--115.
Suceava, Bogdan D.
(with W. G. Boskoff) Applications of homogeneous functions to geometric inequalities and identities in the euclidean plane, 5 (2005) 143--148.
(with W. G. Boskoff) A projectivity characterized by the Pythagorean relation, 6 (2006) 187--190.
(with P. Yiu) The Feuerbach point and Euler lines, 6 (2006) 191--197.
(with W. G. Boskoff and L. H. Odom) An elementary view on Gromov hyperbolic spaces, 12 (2012) 283--286.
(with W. G. Boskoff and L. Homentcovschi) Gossard's perspector and projective consequences, 13 (2013) 169--184.
Svrtan, Dragutin
(with D. Veljan) Non-Euclidean versions of some classical triangle inequalities, 12 (2012) 197--209.
(with D. Veljan) Side lengths of Morley triangles and tetrahedra, 17 (2017) 123--142.