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Tomahawk, Angle Trisector, Geometry Tool

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3D model description

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.

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!


3D printing settings






.1 to .2mm



Draw an angle and trisect it. Please be very careful with the tool, because the spike has a sharp point.

3D printer file information




STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.

When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides:


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