A sheet of a4 paper has aspect ratio \(1:\sqrt2\). This means you can crease it along the shorter of its two midlines to get two rectangles with the same aspect ratio (of a5 size) and continue in the same way recursively.
A sheet of a4 paper has aspect ratio \(1:\sqrt2\). This means you can crease it along the shorter of its two midlines to get two rectangles with the same aspect ratio (of a5 size) and continue in the same way recursively.
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