How strong is a column?How strong is a column?

We tried to balance books on a paper column shaped like a triangle, a square and a circle. Which one held the most books? Try it at home and find out.20160411_123604 20160411_124048 20160411_124247 20160411_124255

We tried to balance books on a paper column shaped like a triangle, a square and a circle. Which one held the most books? Try it at home and find out.20160411_123604 20160411_124048 20160411_124247 20160411_124255

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