Tomahawk, Angle Trisector, Geometry Tool

####Tomahawk: Angle Trisecting Tool

The tomahawk is a classic tool for angle trisection. The **proof** behind it is perhaps more appealing than the tool itself. Here is a *little* one: 60mm x 60 mm x 5mm. A longer handle would allow the trisection of smaller angles. A left-handed version is also included for those who might need it.

To trisect an angle, position the tomahawk so that (1) the vertex of the angle is always on the straightedge of the handle; (2) the spike tip is on one ray of the angle; and (3) the second ray is tangent to the semicircle. Mark the points at the two notches along the blade. Then, draw two rays for the angle trisectors.

**Warning**: The spike has to be sharp for the tool to work. Please use extra caution to avoid injury!

####Reference
https://en.wikipedia.org/wiki/Tomahawk_(geometry)