# Puzzles

## Folding tube maps

Back in 2012, I posted instructions for folding a tetrahedron from tube maps. When tube maps are used, the sides of the tetrahedron are not quite equal. What ratio would the rectangular maps need to be in to give a regular tetrahedron?

If you enjoyed this puzzle, check out Sunday Afternoon Maths V,

puzzles about 2d shapes, or a random puzzle.

puzzles about 2d shapes, or a random puzzle.