How to make an origami chair with triangular legs

(page 10)

17th picture of origami chair with triangular legs

17.

Apply the "reverse swivel-fold" of the step #16.

Prepare to apply another "reverse swivel-fold" .

18th picture of origami chair with triangular legs

18.

Apply the "reverse swivel-fold" of the step #17.

Prepare to apply a "valley-fold" .