Own weird problem

 

A new point of view for https://www.facebook.com/photo/?fbid=10157089677487570&set=gm.588036165021100

 A surp

rinsig point of view:

Pedro Miranda, Trazo Geometrico Maldito, https://www.facebook.com/photo?fbid=4918961154846576&set=gm.1324696758042412

 

Geometria Top, Thanos, https://www.facebook.com/photo/?fbid=1377977119315096&set=gm.1159730481463986

 I doubt the author performed annoying trigo calculations, so I tried to figure out such a solution, which you can see in the capture (in fact there is idea for a 2nd solution in Remark, that one I first saw): 

Geometria Top, Angel Silva Palacios, https://www.facebook.com/photo?fbid=775573166736210&set=a.169982140628652

 

Geometria Top, Yuri Pereira, https://www.facebook.com/photo/?fbid=2154032388068533&set=gm.1157913481645686

 

TGM - Felipe Chumpitaz, https://www.facebook.com/104176915536265/photos/a.106679811952642/113764324577524

 

TGO-Felipe Chumpitaz, https://www.facebook.com/photo?fbid=159712029734785&set=gm.307204448078181

 

aops, Japan JMO, 2019, finals 1, https://artofproblemsolving.com/community/c6t48f6h1783289_2019_japan_junior_mathematical_olympiad_finals_1

 

aops, Manhattan Math Comp, https://artofproblemsolving.com/community/c4t48f4h2791248_2016_manhattan_mathematical_olympiad_grades_912_problems_14

 

problem, aops, mmaths mathathon, https://artofproblemsolving.com/community/c4t48f4h2789002_2019_mmaths_mathathon_rounds_57_math_majors_of_america_tournament_for_hs

 Problem 13

Problem, Geometria Top, https://www.facebook.com/photo/?fbid=2016679741874021&set=a.489719407903403

 

Geometria Elemental, SR, https://www.facebook.com/photo/?fbid=10224421427834121&set=gm.3018826571680115