Дата выхода: | сентябрь 2012 |
ISBN: | 978-5-5114-0652-7 |
Объём: | 76 страниц |
High Quality Content by WIKIPEDIA articles! In geometry, flexagons are flat models, usually constructed by folding strips of paper, that can be flexed or folded in certain ways to reveal faces besides the two that were originally on the back and front.