Gogeometry, pb. 1592, https://gogeometry.blogspot.com/2025/02/geometry-problem-1592-semicircle.html

 

Geometria Super Top, Sonu Aarnav, https://www.facebook.com/photo/?fbid=1390909832040285&set=gm.1916474962456197&idorvanity=830782544358783

 

Geometria Super Top, https://www.facebook.com/photo/?fbid=954833580150934&set=gm.1914848349285525&idorvanity=830782544358783

 

Geometria Super Top, https://www.facebook.com/photo/?fbid=122223805184203033&set=gm.1914188216018205&idorvanity=830782544358783

 

Problem aops, https://artofproblemsolving.com/community/c6t48f6h3117767_find_the_value_of_an_angles

 

Geometria (solo trazos), https://www.facebook.com/photo/?fbid=3517613345126802&set=gm.1695542187624532&idorvanity=715291165649644

 

aops, https://artofproblemsolving.com/community/c6t48f6h3533040_interesting_problem

 

A facebook page, https://www.facebook.com/photo?fbid=908523627936221&set=gm.1992994927858543&idorvanity=179005525924168

 My solution: 

Nelson Tunala, https://www.facebook.com/photo?fbid=9338818079519919&set=a.542610499140765

 

Aops, https://artofproblemsolving.com/community/c6t48f6h3528316_problem_4

 

aops, https://artofproblemsolving.com/community/c6t48f6h3523192_simple_vector_geometry_existence

 

FB page of Miguel Ochoa Sanchez, by Apostolis Manoloudis, https://www.facebook.com/photo?fbid=10222024392671953&set=a.10204195739726772

 

Pedro Miranda, https://www.facebook.com/photo/?fbid=4695212660554761&set=gm.1282324112279677

 

FB page of Nelson Tunala, https://www.facebook.com/photo/?fbid=9310134722388255&set=a.542610499140765

 

Geometria (Solo Trazos), https://www.facebook.com/photo/?fbid=665694776104121&set=gm.2032877370536965&idorvanity=179005525924168

 I hope this solution is no longer useful!

 

Trazo Geometrico Maldito, https://www.facebook.com/photo/?fbid=2077148769394451&set=gm.2021433408368740&idorvanity=715291165649644

 

FB page of Miguel Ochoa Sanchez, pb. 9, https://www.facebook.com/photo/?fbid=3821293214823578&set=pcb.3821288021490764

 

FB page of Miguel Ochoa Sanchez, https://www.facebook.com/photo/?fbid=3821293111490255&set=pcb.3821288021490764

 My solution

FB page of Miguel Ochoa Sanchez, https://www.facebook.com/photo/?fbid=3821292944823605&set=pcb.3821288021490764

 My very annoying solution attached. Note: The e-book 'Rose thorns - Geometry Jewels' you may find at https://ebooks.gil.ro/acasa/191-rose-thorns-geometry-jewels-ebook.html. A further e-book with many solved problems, using that method and other ones, 'Cactus Bloom - Geometry Problems Collection' may also be found

at https://ebooks.gil.ro/acasa/203-cactus-bloom-geometry-problems-collection-ebook.html

FB page of Miguel Ochoa Sanchez, https://www.facebook.com/photo/?fbid=3821292811490285&set=pcb.3821288021490764

 My awkward solution to this problem

Problem, aops, https://artofproblemsolving.com/community/c6t48f6h2267253_equal_angles_wanted_trapezoid_equal_segments_right_angle_related

 My solution: 

aops, https://artofproblemsolving.com/community/c4t48f4h3520153_angle_is__always_45

Still using inversion, 

 

Geometria Super Top, Hakan Ersoz, https://www.facebook.com/groups/830782544358783

 A nice an easy to understand synthetic solution to this beautiful problem

FB page of Kenan Rustemov, https://www.facebook.com/photo?fbid=802536598658713&set=pcb.802536625325377

 My solution

aops, https://artofproblemsolving.com/community/c6t48f6h2547832_triangle_with_60ampdeg_angle_projection_of_othocenter_onto_median

My solution

aops, https://artofproblemsolving.com/community/c6t48f6h144817_find_the_angle

 My solution: