Geometria Super Top, https://www.facebook.com/photo?fbid=1455912716165133&set=gm.2199590264144664&idorvanity=830782544358783

 

Aops, https://artofproblemsolving.com/community/c6t48f6h2810357_find_the_measure_of_the_angle

 

Aops, https://artofproblemsolving.com/community/c4t48f4h2576360_amc12_abc__2021_denmark_mohr_p4

 

Geometria Super Top, Miguel Angel Tintaya, https://www.facebook.com/photo/?fbid=122178239198785001&set=gm.2196154667821557&idorvanity=830782544358783

 

George Tsikaloudakis, I Love Geometry, https://www.facebook.com/photo?fbid=2342206639611013&set=gm.1637750907662217&idorvanity=1216680106435968

 

Own, in connection with: https://www.facebook.com/groups/830782544358783/posts/2188242201946137/?comment_id=2188570725246618¬if_id=1771665940654936¬if_t=feedback_reaction_generic&ref=notif

 

aops, https://artofproblemsolving.com/community/c6t48f6h3775820_trapezoid_and_an_equilateral_triangle