How to make an origami chair with triangular legs

(page 16)

29th picture of origami chair with triangular legs

29.

Apply the horizontal "valley-fold" of the step #28.

Prepare to unfold the bottom crease.

30th picture of origami chair with triangular legs

30.

Unfold the bottom crease of the step #29.

Prepare to apply a "valley-fold" .