# Angle Trisection by Paper Folding!

- Author:
- Tim Brzezinski

Creation of this applet was inspired by a reference contained in Matt Parker's book,

__Things to Make and Do in the Fourth Dimension__(pages 35 - 37). Credit for the discovery of this method of angle trisection via paper folding comes from Hisashi Abe (Hokkaido University, Japan, 1980). The goal here is to**TRISECT the RED ANGLE.**You can alter the size of the**red angle**by using the**red slider.**You can move the**LARGE WHITE POINT**as well.## Angle Trisection via Paper Folding: Can you do this with paper?

## 1.

How can we formally prove why this method of angle trisection actually works?

## 2.

What aspect(s) about this construction cause this **red angle** to be impossible to trisect via a pure "compass and straightedge" method?