#backtoschool Trig Ruler

thingiverse

A foldable ruler featuring a built-in pencil and pencil topper displaying helpful trigonometry formulas is available. This ruler extends to 46cm in length and can also be rotated into various shapes for demonstrating common trigonometric terms and definitions. The innovative design comes from I Made That, found on their website at www.imadethat3d.com. It's perfect for back-to-school season!