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Mathematics
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ergonomic straightedge (ruler)
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I felt that rulers were uncomfortable to hold while graphing lines equations and shapes in geometry. I wanted something that was comfortable to hold but also works well and doesnt get in the way of anything. I designed this which can be held in your left hand between your thumb and pointer fingers and is comfortable to complete classwork with. I designed this to be printed with a 0.2mm nozzle (recommended) but I included a 0.4mm preset too.
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