The hexagon $ABCDEF$ has all angles equal . We know that four consecutive sides of the hexagon have lengths $7, 6, 3$ and $5$ in this order. What is the sum of the lengths of the two remaining sides?
Problem
Source: 2020 Dürer Math Competition Finals Day2 E5 https://artofproblemsolving.com/community/c1622639_2020_
Tags: equal angles, hexagon, geometry