MathDB
2012 preRMO p10, 2 equilaterals inside a square

Source:

June 16, 2019
geometry

Problem Statement

ABCDABCD is a square and AB=1AB = 1. Equilateral triangles AYBAYB and CXDCXD are drawn such that XX and YY are inside the square. What is the length of XYXY?