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Star-4

12 vertices

28 edges

18 faces
2 squares
(2 sq.)
16 rectangular
isoceles
triangles
(12 tr.)
plain

2 paper
strips,
each divided
into 2 parts

2 sq.
16 tr.
pattern download,
2790 x 1398 pix, 250 kb, vs.jpg
plaiting scheme:
↑↑a1a2a3a4a5
Ii5 IIi3 IIi1 IIi4 IIi2 II
IIi5 Ii3 Ii1 Ii4 Ii2 I
       link: L10a121 (mirror image)
Cube with
"propeller"

12 vertices

28 edges

18 faces
2 squares
(2 sq.)
16 rectangular
isoceles
triangles
(12 tr.)
plain

2 paper
strips,
each divided
into 2 parts

2 sq.
16 tr.

pattern download,
2790 x 1398 pix, 230 kb, vw.jpg
plaiting instruction see above, red lines: mountain folding.
plaiting page