Stanley Rabinowitz, Romantics of Geometry, "plum challenge"

 

Own problem, inspired by Kadir Altintas

 Attached, own problem inspired by Kadir Altintas and my proof

Jose Pelaez XI, Geometria (solo trazos), Feb. 10th, 2023

Below, my solution to this old problem

 

Problem 35 Gogeometry

 Attached

Problem aops, https://artofproblemsolving.com/community/c6t48f6h2968879_ltpmq90o_if_ltbac_ltxbcltxcb30o_apbp_aqcq

 My solution in attachment

Problem 1499, Go Geometry

 Attached, my solution to this problem

Problem 1497 Go geometry

 Attached the problem and my solution, I hope you will like it