Let
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and
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be two squares in the same plane, their sides of equal length. Is it possible to decompose
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into a finite number of triangles
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with mutually disjoint interiors and find translations
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such that
%V0
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 $T_1, T_2, \cdots , T_p$ with mutually disjoint interiors and find translations $t_1, t_2,\cdots , t_p$ such that
$$K'=\bigcup_{i=1}^{p} t_i(T_i) \ ?$$