How to make a regular octagon out of square paper

(page 6)

9th picture of regular octagon out of square paper

09.

Here is another method of making a regular octagon which is more complicate.

Start with the front side of the paper facing up.

Prepare to valley-fold in half vertically and then unfold.

10th picture of regular octagon out of square paper

10.

Valley-fold the paper in half vertically and then unfold.

Prepare to valley-fold in half horizontally and then unfold.

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