I really enjoyed this video about how to trisect angles. Trisection of arbitrary angles is impossible using only a straightedge and compass; however, it is possible by carefully folding a piece of paper.

For further reading:

I really enjoyed this video about how to trisect angles. Trisection of arbitrary angles is impossible using only a straightedge and compass; however, it is possible by carefully folding a piece of paper.

For further reading:

*Posted by John Quintanilla on August 13, 2017*

https://meangreenmath.com/2017/08/13/constructing-an-angles-trisectors/

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## Joseph Nebus

/ August 14, 2017I remember running across an angle trisection with compass, straightedge, and two marks in Courant and Robbins’s What Is Mathematics and feeling like I’d been let in on a deep secret of the universe.

## sinthorel

/ September 3, 2017Galois Theory by Ian Stewart gives a brilliant breakdown of why this problem is impossible with straight edge and compass, as well as other famous problems such as squaring the circle.