「Deformation: square → triangle → wedge」
diagrams in variation
Deformation of fish base diagrams in the reverse direction to that in the preceding article:
Deformation: triangle → square → kite.
A flatly foldable fish base diagram in variation defined on a 'wedge' shaped (non-convex) quadrilateral which corresponds to a part of the modified bird base diagram on a square appeared in the article:
Transformation: Fish base → Bird base → Fish base.

The quadrilateral above is in wedge-shaped while 45°>θ≧ 0°.

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