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Ruler - Wikipedia, the free encyclopedia
A ruler, or rule, is an instrument used in geometry, technical drawing and engineering/building to measure distances and/or to rule straight lines.
The Ruler Game - Learn To Read A Ruler
The Ruler Game - Learn to read a ruler! This online game will help you learn to read a ruler. Fun and easy for both students and adults.
ruler - definition of ruler by the Free Online Dictionary, Thesaurus ...
rul·er (r l r) n. 1. One, such as a monarch or dictator, that rules or governs. 2. A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.
Ruler definition | Dictionary.com
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ruler definition | Dictionary.com
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ruler - Definition of ruler at Your Dictionary
noun. a person or thing that rules or governs; a thin strip of wood, metal, etc. with a straight edge and markings in whole and fractional units of length, as inches or centimeters ...