In this video, we solve a problem that appeared as Problem 4 on the 2017 International Math Olympiad using elementary techniques such as angle-chasing.
Thank you for watching! Please subscribe if you would like to see more videos.
My other videos: https://www.youtube.com/channel/UCalV4WkRXss44Cm_7dwlCLg
My AoPS Account: https://artofproblemsolving.com/community/user/474135
