Question 15
5a. (FRA 3) Let $K$ and $K'$ be two squares in the same plane, their sides of equal length. Is it possible to decompose $K$ into a finite number of triangles $T_1,T_2,\ldots,T_p$ with mutually disjoint interiors and find translations $t_1,t_2,\ldots,t_p$ such that
$$K'=\bigcup_{i=1}^p t_i(T_i)?$$
$$K'=\bigcup_{i=1}^p t_i(T_i)?$$