How to make an equilateral triangle out of square paper

(page 2)

1st picture of equilateral triangle out of square paper

01.

Let us start with the front side facing up.

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

2nd picture of equilateral triangle out of square paper

02.

mountain-fold in half horizontally and then unfold.

Prepare to apply a slanted valley-fold.

Make sure the upper-left corner (diamond) merged on the horizontal half line after applying the valley-fold.

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