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CONVEX POLYHEDRON
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FLEXED TRIANGLE
Done!
Done!
HERE’S HOW
Push inward on the model with your hands. Is the model
fairly rigid and stable?
Rigid polyhedron
WHAT’S HAPPENING
A polyhedron is a three-dimensional shape with
many sides. Here, you made a six-sided
polyhedron out of the flexed triangles. Because it
is made up of triangles, this shape is very rigid
and hard to deform.
Triangles are often said to be the strongest shapes.
They are rigid and stable. This is because a triangle
simply cannot deform into another shape as long as
its sides don’t deform. Triangles are therefore the
basis of most rigid structural frames. In this model,
you can see how when the flexible rods are flexed
and formed into a triangle, a strong shape results.
What happens
when you combine
many of these
flexed triangles
into one 3D shape?
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