What is Kawasaki theorem?
[[File:Kawasaki's theorem.jpg|thumb|The alternating sum is zero, so the figure can be flat-folded]] The '''Kawasaki theorem''' is a [[theorem]] relating to the [[mathematics]] of [[Origami|paper folding]]. It states that when folding [[paper]], a figure will be flat, if and only if all of the [[Angle|angles]] have an [[alternating sum]] of zero. {{math-stub}} [[Category:Mathematical theorems]]