‘Treegonometry’ uses math for perfect Xmas tree

But what size should the kitten be?
(Credit: Bernie McGinn)
Let’s say you just bought a 6-foot Christmas tree and want to decorate it just so. According to a quick treegonometric calculation, you should use approximately 30 feet of tinsel. (I got that number, incidentally, by multiplying pi by 13, dividing that number by 8, and then multiplying that figure by the tree’s height in centimeters.)
Didn’t study treegonometry in high school? That’s because it just got invented by members of the University of Sheffield’s SUMS math society. Two students at the U.K. school set out to calculate the…

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