MathDB
angles wanted, equal segments given (2019 Novosibirsk Oral Geo Oly 7.3)

Source:

April 26, 2021
geometryanglesequal segments

Problem Statement

Equal line segments are marked in triangle ABCABC. Find its angles. https://cdn.artofproblemsolving.com/attachments/0/2/bcb756bba15ba57013f1b6c4cbe9cc74171543.png