How to make a medium square origami box (page 3)

 

03. Mountain-fold in half vertically according to the step #2 and then unfold.   Prepare to apply a "valley-fold" so that the bottom-left corner resides on the vertical middle line.   This should be called a 30 degrees "valley-fold" .

04. Apply the "valley-fold" of the step #3 so that the bottom-left corner resides on the vertical middle line.   Prepare to unfold the "valley-fold" that you have just applied.

 

 

 

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