Image: Protractor2
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Description: By Richard Wheeler (Zephyris) 2007.
Title: Protractor2
Credit: Transferred from en.wikipedia to Commons by Melesse using CommonsHelper.
Author: Zephyris at English Wikipedia
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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