Cut the board shown in the figure into four identical parts so that each of them contains three shaded cells.
Cut a square into three pieces, from which you can construct a triangle with three acute angles and three different sides.
Two boys had two square cakes. Each made two straight cuts on his cake from edge to edge. In this case, one ended up with three pieces, and the other with four. How could this be?
Giuseppe has a sheet of plywood, measuring $22 \times 15$. Giuseppe wants to cut out as many rectangular blocks of size $3 \times 5$ as possible. How should he do it?
Cutting into four parts. Cut each of the figures into four equal parts $($you can cut along the sides and diagonals of cells$)$.