Find all quadrilaterals which can be covered (without overlappings) with squares with side $ 1$ and equilateral triangles with side $ 1$. (Emanuele Tron)
Problem
Source: Oliforum Contest V 2017 p2 https://artofproblemsolving.com/community/c2487525_oliforum_contes
Tags: Tiling, combinatorics, combinatorial geometry, Squares, equilaterals