Adjustable Educational Geometry Ruler / STEM Teaching Aid

This adjustable 4-sided ruler is designed as a practical STEM educational tool for math and geometry lessons. By sliding and locking the corner pins along the slots, users can easily form and demonstrate various quadrilaterals (such as squares, rectangles, parallelograms, and rhombuses).

It is an excellent hands-on tool for teaching perimeter, angles, and the dynamic properties of geometric shapes. Each side features a clear 0-20 measurement scale.

Manufacturing & Assembly:
The design is highly versatile and maker-friendly. It can be easily manufactured using:

3D Printing: Optimized for both FDM and DLP/SLA resin printers. The flat parts print quickly without the need for complex supports.

Laser Cutting: Perfect for cutting out of 3 mm acrylic, plywood, or MDF sheets.

Assembly: Simply align the slotted rulers and insert the 4 connecting pins/knobs. No extra hardware is required!