Project taught by Dr. Eva Szillery at the Downtown Education Collaborative in Lewiston, ME.
This module was originally designed by: Mitsonobu Sonobe
For more information about Sonobe Modules: http://www.math.lsu.edu/~verrill/origami/sonobe/index.html
The Sonobe Model shape can be used to create a cube, a stellated
octahedron, or a stellated dodecahedron. In the picture below, you can
see a finished Sonobe Model Unit (left) and a cube (right) that can be
built using six of those units.
To make the Sonobe Unit:
Step 1: Fold paper in half to form a mountain fold as shown below.
to the mountain fold. Then unfold, as shown below.
as shown below. Be sure that the triangles you create in these folds
line up with the parallel folds on the square.
edge up to the center crease, leaving the corners tucked under as
bottom right corner up. The left edge of the larger triangle formed should
be perpendicular to the bottom of the rectangular shape you started with.
process you can use to close the top of a cardboard box without tape!
way that you form two congruent triangles with the fold as shown below.
is bisected, creating four congruent triangles. the center "square" should
pop out toward you, and the two side triangles should have bends inward
as shown below.
build. Be sure ALL of the pieces stack neatly on top of each other.
They must be identical in order to be used for building!