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Concept
Ruler Usage
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Summary
A ruler is a tool that helps us measure how long things are and draw straight lines. It has numbers and lines on it that show us the length in inches or centimeters.
Concepts
Measurement
Length
Units Of Measurement
Inches
Centimeters
Straight Line
Comparison
Relevant Degrees
General Mechanics 86%
Instrument-Making in General 14%
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