MATHEMATICS AND ORIGAMI

Mathematics and Origami

18.9.4 OCTAHEDRON made of two interlocked domes

Start with a square (Fig. 1) and divide the perigon at O, in 12 angles of 30º. Divide in
halves the four angles type AOF. Fold all the lines with the exception of the four segments type
OE. Cut as shown.
By so doing we get a quadrangular pyramid shaped as a dome (in fact a half-
octahedron). Repeat to get a second dome.

(^2) l
a
H
a
l 3
2

3

1

E F A C

O

B

A B

C

2

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