What shapes can be added from two identical right-angled triangles?

From two identical right-angled triangles, you can add:

1. An isosceles triangle, if you put the figures together, placing their right angles at one point.

2. Parallelepiped. If you lean their two identical sides with right angles, but so that the points of their right angles are on opposite sides.

3. Rectangle. If you make triangles together, leaning their hypotenuses against each other.

4. Different irregular carvings when leaning unequal sides against each other.



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