aops, https://artofproblemsolving.com/community/c6t48f6h2669101_short_geo_problem

 

IGO 2014, aops, Morteza Saghafian, https://artofproblemsolving.com/community/c6t48f6h1677987_equal_angles_when_ltc__lta__90o

 

Training Geometry Olimpiad, Problem 971 by Biro Istvan

 

Training Geometry Olympiad, Te Vie

 An easy solution

aops, https://artofproblemsolving.com/community/c4t48f4h2673256_three_squares

 

Portugal 2021, aops

 

Geometria top, Problem 16/09/2021, https://www.facebook.com/photo/?fbid=10223936883428665&set=gm.1047502702686765

 

Torricelli - Fermat application, https://www.facebook.com/photo/?fbid=1264048620734007&set=gm.1203976553447767

 

easy but ... very easy, https://artofproblemsolving.com/community/c6t48f6h2668542_apparantly_easy_but

 

2021 Saudi Arabia JBMO Test, https://artofproblemsolving.com/community/c6t48f6h2664592_bckm_if_cmck_and_ltcbm__2_ltabm_and_k_lies_on_median_bm

 

aops, https://artofproblemsolving.com/community/c4t48f4h2665388_ma_bisects_ltkml__kc__ac_lbab_2012_arg_regional_cpr_32

 

Stanley Rabinowitz, Romantics of Geometry, 8804

 

aops, https://artofproblemsolving.com/community/c6t48f6h2664576_geometria

 

2012 Cono Sur, Brasil Test

 This solution has been given by my son to one of his class mates when a IMO test was given back in 2001-2002, although at that time only AN bisector of <BNC might have been requested.

2021 I Grupo Mate, https://artofproblemsolving.com/community/c4t48f4h2659932_cd__baad14_angles_30o45o75o__2021_i_oim_grupo_mate_l3_p6

 

Felipe Chumpitaz, Trazo Geometrico Maldito, https://www.facebook.com/photo/?fbid=627276181593874&set=pcb.627276401593852