Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...
Boing Boing on MSNOpinion
Two twisty doughnut shapes solve a 150-year-old geometry puzzle
In 1867, French mathematician Pierre Ossian Bonnet proved something that seemed like common sense: if you know how far apart ...
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