Gasherbrum - 4 Intersecting Triangles - Modular Origami - No Glue: Hi guys and gals :) Time for something slightly easier! This is the easiest of the 5 himalayan peaks by Robert Lang. This model took me just over 2 hours to fold, and it's loads of fun! Doable in one sitting ;) The maths: These are 4 equilateral …