protractor

A drafting instrument used to draw or measure angles.

• 🇨🇳用于测量或绘制角度的绘图工具，通常为半圆形，刻度以度为单位。

1. Drafting instrument A2 formal

   A tool used in geometry and drafting to measure and draw angles, typically a semicircular or circular piece of plastic or metal marked with degrees.

   • The student used a protractor to measure the angle of the triangle.
   • She carefully aligned the protractor with the base of the angle.
   • A protractor is an essential tool for geometry class.

   🇨🇳量角器

• protractors plural form
• protractors' possessive plural form
• protractor's possessive singular form