gyri
fracture
gyrus
strike
The Strike
Strike
Fold the top angle over from about 1/3 up over the centre to create a point at the bottom and a flat surface at the top.
"if the map is laminaed then you roll it if its paper you fold it :)" That's not a bad answer but, it really doesn't matter whether you roll it or fold it. I suggest just rolling it.
If the length of the sides triples, the surface area increases 9-fold.
First you would lie it on a flat surface, then fold the left shoulder flap over to the right, then fold the right shoulder flap over the left. You then fold the kimono equally in half, fold the arms inside, and fold in half again.
It's when you fold the paper in half down the center and when you stand the folded paper on a flat surface, it sticks up like a mountain!
A step-like fold across the stack
The Function of Gyri (pl.Gyrus) One of the prominent rounded elevation that form the cerebral hemispheres, each consisting of an exposed superficial portion and a portion hidden from view in the wall and floor of the sulcus.