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Blast from the Analog Past! Physicist Identifies First Protractor

Egyptian artifact recently identified as world's first known protractor, via www.newscientiest.com
Egyptian artifact recently identified as world's first known protractor, via www.newscientiest.com

And now a controversial look back… way back. Physicist Amelia Sparavigna recently identified an artifact in a Turin museum as the world’s first known protractor. Sparavigna argues that the artifact’s ornate decoration, which resembles a compass rose with 16 evenly spaced petals surrounded by a zigzag with 36 corners, was used in combination with a plumb line to measure the slope angle of an object beneath it.