Gogeometry, Antonio Gutierrez, https://gogeometry.blogspot.com/2023/03/geometry-problem-1523-discover-how-to.html

 

Aops, Erik Lim, https://artofproblemsolving.com/community/c6t48f6h3821925_angle_aob_in_a_triangle_with_a_bisector_and_ratio_point

 

Fatih Eymen Hallac, https://www.facebook.com/photo?fbid=10163652155783190&set=gm.964231823089984&idorvanity=418649204314918

 

Romantics of Geometry, Nelson Tunala, repost of Confident Bee3824, in 'Trazos Auxiliares en Geometria', https://www.facebook.com/photo/?fbid=26405872469054547&set=gm.26727441590276194&idorvanity=1019808738132832

 

Gogeometry, Antonio Gutierrez, problem 920,

Gogeometry, Antonio Gutierez, https://gogeometry.com/school-college/6/p1582-outside-point-secants-circle-equal-angles-cyclic-quadrilateral-problem.html

 

Gogeometry, AntonioGutierez, https://gogeometry.com/school-college/6/p1591-quadrilateral-ABCD-congruent-sides-proportional-angles-7-10-5-calculate-angle-D.html

 

Gogeometry, Antonio Gutierez, https://www.gogeometry.com/school-college/4/p1389-triangle-40-20-degree-angle-congruence-tutoring.htm

 

Gogeometry, Antonio Gutierez, https://gogeometry.com/school-college/6/p1565-triangle-median-perpendicular-midpoint-congruence-tutoring.html

 

Geometria Super Top, WayMoorthy Moorthy, https://www.facebook.com/photo?fbid=957222900020724&set=gm.2234370147333342&idorvanity=830782544358783

 

Geometria Super Top, https://www.facebook.com/photo/?fbid=3223494744497459&set=gm.2232901260813564&idorvanity=830782544358783

 

AOPS https://artofproblemsolving.com/community/c4t48f4h3801861_mtrp_2024_junior_online_integer_3

 

Anie Luc, posted by Chris Wildhagen, https://www.facebook.com/photo?fbid=1568765494283961&set=gm.2085688605534831&idorvanity=830782544358783

 

Comunitatea Profesorilor de Matematica din Romania, Turkiye Contest, https://www.facebook.com/photo?fbid=122190801800433379&set=gm.4458278801126780&idorvanity=1467372433550780

 

Geometria Super Top, Miguel Angel Tintaya, https://www.facebook.com/photo?fbid=122182183466785001&set=gm.2225670991536591&idorvanity=830782544358783

 

I Love Geometry, WayMoorthy Moorthy, https://www.facebook.com/photo/?fbid=947191211023893&set=gm.1675276253909682&idorvanity=1216680106435968

 

Les Perles Mathematiques, Naibe Pereira, https://www.facebook.com/photo?fbid=122171191358801239&set=gm.2707879176278627&idorvanity=183174185415818