[일반] 여러가지 각문제

[gua5(121.130)]

Geometry Problems 1-10. Level: High School, College

http://www.gogeometry.com/math_geometry_online_courses/geometry_problems_1_10.html

일반화된 랭글리문제를 삼각함수없이 풀기

https://www.gensu.co.jp/saito/challenge/pdf/3circumcenter_d20180609.pdf

Langley’s Adventitious Angles 

https://en.wikipedia.org/wiki/Langley%E2%80%99s_Adventitious_Angles