How to do it,because I do not know
1 answer:
check the picture below.
now, placing the band's members on those locations, gives us 4 quadrilaterals, if we fold the paper along the y-axis and then along the x-axis, namely vertically and horizontally like folding a letter, the quadrilaterals will over end up pancaked on each other, due the symmetry, namely one quadrant mirroring the other quadrant.
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