Concepts in Action: Sensorial demonstration of the difference between H1 and H2

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Verify the congruency between the triangle whole inset and the small red equilateral triangle, by superimposing the inset on the wooden triangle.
In the same way, we can see that this metal inset is equal to 1/6 of the grey trapezoid.
Superimpose H2 on H1 so that the vertices of the grey hexagon coincide with the midpoints of the sides of the yellow hexagon.
Place the 1/3 metal inset pieces over the yellow portion that remains visible.
With this material we can cover only three places.
However these three obtuse-angled triangles equal one small red equilateral triangle.
Move the three thirds to the three remaining vacant spots; these three triangles correspond to the second small red equilateral triangle.

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