protractor

美 [proʊˈtræktər]
英 [prəˈtræktə(r)]
  • n.量角器;分度规
  • 网络分度器;量角器工具;半圆规
复数:protractors  
PROTRACTOR
n.
1.
量角器;分度规an instrument for measuring and drawing angles, usually made from a half circle of clear plastic with degrees (0˚ to 180˚) marked on it

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